# Chemistry: Combined Acid-Base and Redox Titrations

1. Feb 4, 2010

### whiteman

1. The problem statement, all variables and given/known data
Determine acid concentration of a mixture of (COOH)2 and H2SO4 by titration against NaOH
Concentration of NaOH = 0.2M
Average Titre Figure (NaOH) = 8.93cm3
Volume of mixture added = 10mL

2. Relevant equations
2NaOH + (COOH)2 $$\rightarrow$$ 2NaCOO + 2H2O

3. The attempt at a solution
Reaction ratio NaOH: (COOH)2+ions = 2:1:2
Molarity of NaOH 0.2M
Moles of NaOH in 8.93mL = 1.786 x 10-3 mol
Moles of H+ ions = 1.786 x 10-3 mol in 10mL

A similar calculation for H2SO4. Then do you just add the moles and express in mols/L?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution