Would it affect the amount recovered???

Question

the recovery of CaCO3 was attempted by adding 3M H2SO4 instead of 3M HCl to the SiO2 / CaCO3 residue

Answer 1

You failed to mention how much calcium carbonate there is. I think this is a homework problem, so I am gonna walk you through it rather than answer directly.

Write down the chemical equilibrium equations. Does H+ end up in the numerator or denominator when you solve for the amount of Ca+2 in solution?

Now, which eqn. will end up with more H+ in solution?

Even if you have not studied chemical equilibria yet, just ask yourself, which one has more H+ available for turning that pesky ol' carbonate into water and CO2?