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Few chemistry tasks that I don't understand at all |
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| Jun5-11, 04:22 AM | #1 |
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Few chemistry tasks that I don't understand at all
1. Here are few chemistry tasks,I need your help!
2. 4.120g 15% BaCl2 solution is added to 800ml 0,2mol/L Iron (III) sulphate solution.How many g of precipitate formed?Which and how much of material did not react? 5. 5g of solution,which consists of copper and zinc,is affected by solution of H2SO4. 0,05 mol of gas formed.Calculate W% of copper in the solution. 6.How many g of Fe(sawdust of Fe) will react when added to 50ml 20% HCl solution which has density of 1,1g/cm3 ? 7.What density of 20% HCl(density-1,1g/cm3) solution is needed to dissolve 30g Iron (III) oxide,which has 20% of addition? 8.How many g of salt will form,if 20g of Fe which has 10% of addition,will be affected by solution of H2SO4? 3. As I mentioned I can't understand this at all so I didn't make any attempts on solving these tasks.If you see any grammar mistakes-I'm sorry for that,English isn't my native language. |
| Jun5-11, 04:27 AM | #2 |
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Admin
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Each time you need to start with reaction equation(s).
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