maleic - 13-1-2015 at 00:35
How much hydrogen peroxide can react with sodium sulfite?What is the percentage ? PS:Hydrogen peroxide molecular weight of 34.1, The concentration of
30%.
woelen - 13-1-2015 at 02:57
What reaction do you think can occur? Try to write out the reaction between Na2SO3 and H2O2. From that you can determine the ratio in which they
react.
Praxichys - 13-1-2015 at 07:48
1. Write out the equation and balance the coefficients
2. Find the molecular weights of all components
3. Multiply the weights by their respective coefficients
4. Compensate for concentration by dividing by the percentage
5. Use the numbers to find the reaction ratios
I will do it for you this time to show you how it is done:
1. Equation: Na2SO3 + H2O2 ----> Na2SO4 + H2O
2. Weights: 126 g/mol + 24 g/mol ----> 142 g/mol + 18 g/mol
3. Coefficient: 126 g + 24 g ----> 142 g + 18 g
4. Concen.: 126 g + 80 g ----> 142 g + 18 g
5. Weight ratios: 1.0 + 0.6 ----> 1.1 + 0.1
1. This is the equation
2. These are the molecular weights
3. All of the coefficients in the balanced equation are 1. All the numbers are multiplied by 1.
4. The concentration of H2O2 is 30%, so we need to use more weight (24g/0.3)=80
5. This is calculated for sodium sulfite by dividing all the numbers by the weight of sodium sulfite.