Search found 1565 matches
- Sat Dec 19, 2020 10:49 am
- Forum: Chemistry forum
- Topic: How do I balance this reaction, tool says it has infinite results
- Replies: 1
- Views: 1267
Re: How do I balance this reaction, tool says it has infinite results
Calciumhydroxide reacts with carbonic acid to Calcium carbonate in first reaction. Precipitation happens. Ca(OH)2 + H2CO3 => CaCO3 + 2 H2O In second reaction Calciumhydrogencarbonate is formed, the precipitate get dissolved. CaCO3 + H2CO3 => Ca(HCO3)2 This happens in stalactite caves. If heated deco...
- Thu Dec 17, 2020 12:50 am
- Forum: Chemistry forum
- Topic: balancing high school chem
- Replies: 1
- Views: 1242
Re: balancing high school chem
How do you calculate 1/3 + 1/2? In the same way you have to get coefficients for balancing.
If you have Ni3+ then you should have it in both sites.
Nickel-III-nitrate is Ni(NO3)3
If you have Ni3+ then you should have it in both sites.
Nickel-III-nitrate is Ni(NO3)3
- Tue Dec 15, 2020 4:35 am
- Forum: Chemistry forum
- Topic: Chemical Reaction / Equation
- Replies: 1
- Views: 1428
Re: Chemical Reaction / Equation
Add to Aluminium ions Carbonate/ hydroxide.
- Sun Dec 13, 2020 1:04 pm
- Forum: Chemistry forum
- Topic: Can you solve this chemistry exercise
- Replies: 1
- Views: 1295
Re: Can you solve this chemistry exercise
Very small man.How he can stay in a volume of 24,47 l.
Calculate the volume for 5 %.
Calculate how much is the volume of 5g CO2
Devide the 2 volumes to get the time x 10 min.
Your work now.
Calculate the volume for 5 %.
Calculate how much is the volume of 5g CO2
Devide the 2 volumes to get the time x 10 min.
Your work now.
- Sat Dec 12, 2020 1:27 pm
- Forum: Chemistry forum
- Topic: Chemical Reactions
- Replies: 1
- Views: 1275
Re: Chemical Reactions
The balanced reaction must be Co + 2 Cu 2+ => Co 2+ + 2 Cu+
Two electrons are transferred.
Two electrons are transferred.
- Sat Dec 12, 2020 1:23 pm
- Forum: Chemistry forum
- Topic: Solubility and pH
- Replies: 2
- Views: 1503
Re: Solubility and pH
Silver carbonate will decompose in nitric acid. Silver nitrate and carbon dioxide will be obtained This has good solubility. Silver phosphate will in low pH got hydrogenphosphate and dihydrogenphosphate which is also better soluble.
Silver halogenides not soluble in acid.
Silver halogenides not soluble in acid.
- Tue Dec 08, 2020 12:33 pm
- Forum: Chemistry forum
- Topic: Reação de Oxirredução e Massa
- Replies: 1
- Views: 1159
Re: Reação de Oxirredução e Massa
Please use English 10) A sample of an alloy containing chromium, with a mass of 3,450 g, was dissolved in acid, and all the chromium in the sample was oxidized to CrO4-2 . It was then found that 3.18 g of Na2SO3 were needed to reduce CrO4-2 for CrO2-2 , in a basic solution, with oxidized SO3-2 conve...
- Fri Dec 04, 2020 2:24 pm
- Forum: Chemistry forum
- Topic: Common ion effect question
- Replies: 1
- Views: 1282
Re: Common ion effect question
2,5 mmol in 75 ml = 2,5mmol/75 ml = 0,033 mol/l = 0,033 M
- Wed Dec 02, 2020 2:53 pm
- Forum: Chemistry forum
- Topic: Ionization of acids and bases
- Replies: 1
- Views: 1338
Re: Ionization of acids and bases
In means Indicator. In- is the anion of indicator.
- Wed Dec 02, 2020 2:52 pm
- Forum: Chemistry forum
- Topic: The ionization constant of water and its ionic product
- Replies: 1
- Views: 1287
Re: The ionization constant of water and its ionic product
Its because the dissociation is like this. In neutral water 10^-7 H+ and also the same amount of OH- in solution.
- Thu Nov 26, 2020 11:40 am
- Forum: Chemistry forum
- Topic: How to add attachment, use LaTeX, write chemical equations in this forum?
- Replies: 7
- Views: 3138
- Thu Nov 26, 2020 2:24 am
- Forum: Chemistry forum
- Topic: How to add attachment, use LaTeX, write chemical equations in this forum?
- Replies: 7
- Views: 3138
Re: How to add attachment, use LaTeX, write chemical equations in this forum?
Great, but it needs some explanation of the syntax how to do.
- Wed Nov 25, 2020 11:12 am
- Forum: Chemistry forum
- Topic: CHEM HIGH SCHOOL problem
- Replies: 3
- Views: 1721
Re: CHEM HIGH SCHOOL problem
What happens to these two samples if you add only water?
Ca easily to find.
Ca easily to find.
- Wed Nov 25, 2020 11:09 am
- Forum: Chemistry forum
- Topic: How do I balance this equation?
- Replies: 1
- Views: 1276
Re: How do I balance this equation?
1. Show first, which ones are the redox pairs?
2. Reduction Add H+ hat H2O
3. Oxidation Zn to Zn 2+
4. Balance the charges with e-
5. Equality the electrons
6. Add both equations
7. Eliminate electrons, H+ and water if Impossible.
2. Reduction Add H+ hat H2O
3. Oxidation Zn to Zn 2+
4. Balance the charges with e-
5. Equality the electrons
6. Add both equations
7. Eliminate electrons, H+ and water if Impossible.
- Wed Nov 25, 2020 2:17 am
- Forum: Chemistry forum
- Topic: CHEM HIGH SCHOOL problem
- Replies: 3
- Views: 1721
Re: CHEM HIGH SCHOOL problem
What happens if you Add to all samples HCl.
In Two samples you will observe something.
What happens if you add only water.
In Two samples you will observe something.
What happens if you add only water.