DAT destroyer Gen Chem question

[dental deezle]

Advertisement - Members don't see this ad

how many grams are in 800 ml of a .2 M h2so4 solution.

The answer was .16, but they did not multiply the molarity (.2) by 2 because wouldnt the normality be 2 so the concentration is doubled?

Please help!!

 

[tyjacobs]

For a simple concentration calculation like this, do not focus on normality. ONLY focus on normality when you are doing titration calculations.

Molarity = mol solute / L sol'n
mol solute = molarity * L soln

mol solute = (0.800 Liters) * ( 0.2 Mol/L)
mol solute = 0.16 mol

Now you need to convert to grams:
molar mass of hs2o4 is around 100g/mol

100g/mol * 0.16 mol = 16g

do you mean the answer was 16 grams not .16g?????????