Identify KNO3 and KH2PO4 at home
Clash Royale CLAN TAG#URR8PPP
$begingroup$
I am not expert in chemistry. I need to find a way to identify a $ceKNO3$ and $ceKH2PO4$ powder at home. I suspect the seller gave me the wrong powder. What is a simple way to test between these compounds at home?
inorganic-chemistry home-experiment
edited Mar 19 at 4:23
A.K.
9,32062470
asked Feb 26 at 23:08
IchsanIchsan
471
$endgroup$
add a comment |
$begingroup$
I am not expert in chemistry. I need to find a way to identify a $ceKNO3$ and $ceKH2PO4$ powder at home. I suspect the seller gave me the wrong powder. What is a simple way to test between these compounds at home?
inorganic-chemistry home-experiment
edited Mar 19 at 4:23
A.K.
9,32062470
asked Feb 26 at 23:08
IchsanIchsan
471
$endgroup$
2
$begingroup$
KNO3 is much better soluble in water.
$endgroup$
– Mithoron
Feb 27 at 1:16
1
$begingroup$
Given the number of votes and views gained in such a short time, I hope that you will edit this question to be more clear, As-is I don't know how to answer it.
$endgroup$
– A.K.
Feb 27 at 16:36
add a comment |
$begingroup$
I am not expert in chemistry. I need to find a way to identify a $ceKNO3$ and $ceKH2PO4$ powder at home. I suspect the seller gave me the wrong powder. What is a simple way to test between these compounds at home?
inorganic-chemistry home-experiment
edited Mar 19 at 4:23
A.K.
9,32062470
asked Feb 26 at 23:08
IchsanIchsan
471
$endgroup$
I am not expert in chemistry. I need to find a way to identify a $ceKNO3$ and $ceKH2PO4$ powder at home. I suspect the seller gave me the wrong powder. What is a simple way to test between these compounds at home?
inorganic-chemistry home-experiment
inorganic-chemistry home-experiment
edited Mar 19 at 4:23
A.K.
9,32062470
asked Feb 26 at 23:08
IchsanIchsan
471
edited Mar 19 at 4:23
A.K.
9,32062470
asked Feb 26 at 23:08
IchsanIchsan
471
edited Mar 19 at 4:23
A.K.
9,32062470
edited Mar 19 at 4:23
A.K.
9,32062470
edited Mar 19 at 4:23
A.K.
9,32062470
9,32062470
asked Feb 26 at 23:08
IchsanIchsan
471
asked Feb 26 at 23:08
IchsanIchsan
471
asked Feb 26 at 23:08
IchsanIchsan
471
471
2
$begingroup$
KNO3 is much better soluble in water.
$endgroup$
– Mithoron
Feb 27 at 1:16
1
$begingroup$
Given the number of votes and views gained in such a short time, I hope that you will edit this question to be more clear, As-is I don't know how to answer it.
$endgroup$
– A.K.
Feb 27 at 16:36
add a comment |
2
$begingroup$
KNO3 is much better soluble in water.
$endgroup$
– Mithoron
Feb 27 at 1:16
1
$begingroup$
Given the number of votes and views gained in such a short time, I hope that you will edit this question to be more clear, As-is I don't know how to answer it.
$endgroup$
– A.K.
Feb 27 at 16:36
2
2
$begingroup$
KNO3 is much better soluble in water.
$endgroup$
– Mithoron
Feb 27 at 1:16
$begingroup$
KNO3 is much better soluble in water.
$endgroup$
– Mithoron
Feb 27 at 1:16
1
1
$begingroup$
Given the number of votes and views gained in such a short time, I hope that you will edit this question to be more clear, As-is I don't know how to answer it.
$endgroup$
– A.K.
Feb 27 at 16:36
$begingroup$
Given the number of votes and views gained in such a short time, I hope that you will edit this question to be more clear, As-is I don't know how to answer it.
$endgroup$
– A.K.
Feb 27 at 16:36
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
In the absence of other chemicals you can utilize the fact that nitrates(V) are much stronger oxidizing agents than phosphates(V).
You can soak a piece of newspaper in a saturated solution of the salt, let it dry well in a ventilated place and try to ignite it.
If the salt was $ceKNO3$, it will burn vigorously and fast (that's why kids are often using paper soaked in sodium nitrate as primitive fuse for home-made firecrackers and rockets).
$ceKH2PO4$ doesn't promote combustion of paper, so it will burn normally or even slower.
answered Feb 27 at 5:25
andseliskandselisk
18.5k656122
$endgroup$
2
$begingroup$
Okay. The burning technique is surely simple for detecting $ceKNO3$. Thanks!
$endgroup$
– sancho21
Feb 27 at 15:11
$begingroup$
@sanch21 It looks like you used an unregistered account to ask this question. I just want to point out that you can request to have your accounts merged and be able to accept this answer.
$endgroup$
– A.K.
Mar 19 at 4:28
add a comment |
$begingroup$
Well, given that one is a weak acid and the other is the salt of a strong base and a strong acid, the pH of a solution of the powder should tell you which it is. If it's $ceKNO3$ it should neutral, and if it's $ceKH2PO4$ it should be acidic. Just need some pH paper, which you could probably buy at a pool supply store.
answered Feb 27 at 0:30
ringoringo
20.1k557109
$endgroup$
2
$begingroup$
This could work, but KH2PO4 solution would have pH somewhere around 4.7 - water used at home might be as acidic as this, I guess.
$endgroup$
– Mithoron
Feb 27 at 1:13
3
$begingroup$
@Mithoron so be sure to use the pH-paper to test regular water too.
$endgroup$
– JAD
Feb 27 at 10:56
add a comment |
$begingroup$
Touch medium samples of both salts with a glowing ember. No noticable effect would be observed on contact with $ceKH2PO4$. Contact with $ceKNO3$ shall produce noticeable flame.
Video https://www.youtube.com/watch?v=dJRqJ145dyM
answered Feb 27 at 5:42
permeakrapermeakra
18.2k13682
$endgroup$
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
In the absence of other chemicals you can utilize the fact that nitrates(V) are much stronger oxidizing agents than phosphates(V).
You can soak a piece of newspaper in a saturated solution of the salt, let it dry well in a ventilated place and try to ignite it.
If the salt was $ceKNO3$, it will burn vigorously and fast (that's why kids are often using paper soaked in sodium nitrate as primitive fuse for home-made firecrackers and rockets).
$ceKH2PO4$ doesn't promote combustion of paper, so it will burn normally or even slower.
answered Feb 27 at 5:25
andseliskandselisk
18.5k656122
$endgroup$
2
$begingroup$
Okay. The burning technique is surely simple for detecting $ceKNO3$. Thanks!
$endgroup$
– sancho21
Feb 27 at 15:11
$begingroup$
@sanch21 It looks like you used an unregistered account to ask this question. I just want to point out that you can request to have your accounts merged and be able to accept this answer.
$endgroup$
– A.K.
Mar 19 at 4:28
add a comment |
$begingroup$
In the absence of other chemicals you can utilize the fact that nitrates(V) are much stronger oxidizing agents than phosphates(V).
You can soak a piece of newspaper in a saturated solution of the salt, let it dry well in a ventilated place and try to ignite it.
If the salt was $ceKNO3$, it will burn vigorously and fast (that's why kids are often using paper soaked in sodium nitrate as primitive fuse for home-made firecrackers and rockets).
$ceKH2PO4$ doesn't promote combustion of paper, so it will burn normally or even slower.
answered Feb 27 at 5:25
andseliskandselisk
18.5k656122
$endgroup$
2
$begingroup$
Okay. The burning technique is surely simple for detecting $ceKNO3$. Thanks!
$endgroup$
– sancho21
Feb 27 at 15:11
$begingroup$
@sanch21 It looks like you used an unregistered account to ask this question. I just want to point out that you can request to have your accounts merged and be able to accept this answer.
$endgroup$
– A.K.
Mar 19 at 4:28
add a comment |
$begingroup$
In the absence of other chemicals you can utilize the fact that nitrates(V) are much stronger oxidizing agents than phosphates(V).
You can soak a piece of newspaper in a saturated solution of the salt, let it dry well in a ventilated place and try to ignite it.
If the salt was $ceKNO3$, it will burn vigorously and fast (that's why kids are often using paper soaked in sodium nitrate as primitive fuse for home-made firecrackers and rockets).
$ceKH2PO4$ doesn't promote combustion of paper, so it will burn normally or even slower.
answered Feb 27 at 5:25
andseliskandselisk
18.5k656122
$endgroup$
In the absence of other chemicals you can utilize the fact that nitrates(V) are much stronger oxidizing agents than phosphates(V).
You can soak a piece of newspaper in a saturated solution of the salt, let it dry well in a ventilated place and try to ignite it.
If the salt was $ceKNO3$, it will burn vigorously and fast (that's why kids are often using paper soaked in sodium nitrate as primitive fuse for home-made firecrackers and rockets).
$ceKH2PO4$ doesn't promote combustion of paper, so it will burn normally or even slower.
answered Feb 27 at 5:25
andseliskandselisk
18.5k656122
edited Feb 27 at 5:32
answered Feb 27 at 5:25
andseliskandselisk
18.5k656122
answered Feb 27 at 5:25
andseliskandselisk
18.5k656122
answered Feb 27 at 5:25
andseliskandselisk
18.5k656122
18.5k656122
2
$begingroup$
Okay. The burning technique is surely simple for detecting $ceKNO3$. Thanks!
$endgroup$
– sancho21
Feb 27 at 15:11
$begingroup$
@sanch21 It looks like you used an unregistered account to ask this question. I just want to point out that you can request to have your accounts merged and be able to accept this answer.
$endgroup$
– A.K.
Mar 19 at 4:28
add a comment |
2
$begingroup$
Okay. The burning technique is surely simple for detecting $ceKNO3$. Thanks!
$endgroup$
– sancho21
Feb 27 at 15:11
$begingroup$
@sanch21 It looks like you used an unregistered account to ask this question. I just want to point out that you can request to have your accounts merged and be able to accept this answer.
$endgroup$
– A.K.
Mar 19 at 4:28
2
2
$begingroup$
Okay. The burning technique is surely simple for detecting $ceKNO3$. Thanks!
$endgroup$
– sancho21
Feb 27 at 15:11
$begingroup$
Okay. The burning technique is surely simple for detecting $ceKNO3$. Thanks!
$endgroup$
– sancho21
Feb 27 at 15:11
$begingroup$
@sanch21 It looks like you used an unregistered account to ask this question. I just want to point out that you can request to have your accounts merged and be able to accept this answer.
$endgroup$
– A.K.
Mar 19 at 4:28
$begingroup$
@sanch21 It looks like you used an unregistered account to ask this question. I just want to point out that you can request to have your accounts merged and be able to accept this answer.
$endgroup$
– A.K.
Mar 19 at 4:28
add a comment |
$begingroup$
Well, given that one is a weak acid and the other is the salt of a strong base and a strong acid, the pH of a solution of the powder should tell you which it is. If it's $ceKNO3$ it should neutral, and if it's $ceKH2PO4$ it should be acidic. Just need some pH paper, which you could probably buy at a pool supply store.
answered Feb 27 at 0:30
ringoringo
20.1k557109
$endgroup$
2
$begingroup$
This could work, but KH2PO4 solution would have pH somewhere around 4.7 - water used at home might be as acidic as this, I guess.
$endgroup$
– Mithoron
Feb 27 at 1:13
3
$begingroup$
@Mithoron so be sure to use the pH-paper to test regular water too.
$endgroup$
– JAD
Feb 27 at 10:56
add a comment |
$begingroup$
Well, given that one is a weak acid and the other is the salt of a strong base and a strong acid, the pH of a solution of the powder should tell you which it is. If it's $ceKNO3$ it should neutral, and if it's $ceKH2PO4$ it should be acidic. Just need some pH paper, which you could probably buy at a pool supply store.
answered Feb 27 at 0:30
ringoringo
20.1k557109
$endgroup$
2
$begingroup$
This could work, but KH2PO4 solution would have pH somewhere around 4.7 - water used at home might be as acidic as this, I guess.
$endgroup$
– Mithoron
Feb 27 at 1:13
3
$begingroup$
@Mithoron so be sure to use the pH-paper to test regular water too.
$endgroup$
– JAD
Feb 27 at 10:56
add a comment |
$begingroup$
Well, given that one is a weak acid and the other is the salt of a strong base and a strong acid, the pH of a solution of the powder should tell you which it is. If it's $ceKNO3$ it should neutral, and if it's $ceKH2PO4$ it should be acidic. Just need some pH paper, which you could probably buy at a pool supply store.
answered Feb 27 at 0:30
ringoringo
20.1k557109
$endgroup$
Well, given that one is a weak acid and the other is the salt of a strong base and a strong acid, the pH of a solution of the powder should tell you which it is. If it's $ceKNO3$ it should neutral, and if it's $ceKH2PO4$ it should be acidic. Just need some pH paper, which you could probably buy at a pool supply store.
answered Feb 27 at 0:30
ringoringo
20.1k557109
answered Feb 27 at 0:30
ringoringo
20.1k557109
answered Feb 27 at 0:30
ringoringo
20.1k557109
answered Feb 27 at 0:30
ringoringo
20.1k557109
20.1k557109
2
$begingroup$
This could work, but KH2PO4 solution would have pH somewhere around 4.7 - water used at home might be as acidic as this, I guess.
$endgroup$
– Mithoron
Feb 27 at 1:13
3
$begingroup$
@Mithoron so be sure to use the pH-paper to test regular water too.
$endgroup$
– JAD
Feb 27 at 10:56
add a comment |
2
$begingroup$
This could work, but KH2PO4 solution would have pH somewhere around 4.7 - water used at home might be as acidic as this, I guess.
$endgroup$
– Mithoron
Feb 27 at 1:13
3
$begingroup$
@Mithoron so be sure to use the pH-paper to test regular water too.
$endgroup$
– JAD
Feb 27 at 10:56
2
2
$begingroup$
This could work, but KH2PO4 solution would have pH somewhere around 4.7 - water used at home might be as acidic as this, I guess.
$endgroup$
– Mithoron
Feb 27 at 1:13
$begingroup$
This could work, but KH2PO4 solution would have pH somewhere around 4.7 - water used at home might be as acidic as this, I guess.
$endgroup$
– Mithoron
Feb 27 at 1:13
3
3
$begingroup$
@Mithoron so be sure to use the pH-paper to test regular water too.
$endgroup$
– JAD
Feb 27 at 10:56
$begingroup$
@Mithoron so be sure to use the pH-paper to test regular water too.
$endgroup$
– JAD
Feb 27 at 10:56
add a comment |
$begingroup$
Touch medium samples of both salts with a glowing ember. No noticable effect would be observed on contact with $ceKH2PO4$. Contact with $ceKNO3$ shall produce noticeable flame.
Video https://www.youtube.com/watch?v=dJRqJ145dyM
answered Feb 27 at 5:42
permeakrapermeakra
18.2k13682
$endgroup$
add a comment |
$begingroup$
Touch medium samples of both salts with a glowing ember. No noticable effect would be observed on contact with $ceKH2PO4$. Contact with $ceKNO3$ shall produce noticeable flame.
Video https://www.youtube.com/watch?v=dJRqJ145dyM
answered Feb 27 at 5:42
permeakrapermeakra
18.2k13682
$endgroup$
add a comment |
$begingroup$
Touch medium samples of both salts with a glowing ember. No noticable effect would be observed on contact with $ceKH2PO4$. Contact with $ceKNO3$ shall produce noticeable flame.
Video https://www.youtube.com/watch?v=dJRqJ145dyM
answered Feb 27 at 5:42
permeakrapermeakra
18.2k13682
$endgroup$
Touch medium samples of both salts with a glowing ember. No noticable effect would be observed on contact with $ceKH2PO4$. Contact with $ceKNO3$ shall produce noticeable flame.
Video https://www.youtube.com/watch?v=dJRqJ145dyM
answered Feb 27 at 5:42
permeakrapermeakra
18.2k13682
answered Feb 27 at 5:42
permeakrapermeakra
18.2k13682
answered Feb 27 at 5:42
permeakrapermeakra
18.2k13682
answered Feb 27 at 5:42
permeakrapermeakra
18.2k13682
18.2k13682
add a comment |
add a comment |
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2
$begingroup$
KNO3 is much better soluble in water.
$endgroup$
– Mithoron
Feb 27 at 1:16
1
$begingroup$
Given the number of votes and views gained in such a short time, I hope that you will edit this question to be more clear, As-is I don't know how to answer it.
$endgroup$
– A.K.
Feb 27 at 16:36