Please help!...

Lakes that have been acidified by acid rain (HNO3 and H2SO4) can be neutralized by a process called liming, in which limestone (CaCO3) is added to the acidified water. Write ionic and net ionic equations to show how limestone reacts with HNO3 and H2SO4 to neutralize them. How would you be able to tell if the neutralization process was working?

2 answers

2HNO3 + CaCO3 ==> CO2 + H2O + Ca(NO3)2
H2SO4 + CaCO3 ==> CO2 + H2O + CaSO4

You can turn them into ionic and net ionic equations.
Lakes that have been acidified by acid rain (HNO3 and H2SO4) can be neutralized by a process called liming, in which limestone (CaCO3) is added to the acidified water.

What mass of limestone (in kg) would be required to completely neutralize a 15.3 billion-liter lake that is 1.7×10^−5M in H2SO4 and 8.8×10−6M in HNO3?