A sample of dolomite contained 45% of CaCO3, 40% of MgCO3, and 15% clay. Calculate the mass of sulphuric acid of 30% strength required to react completely with 10 gms of the sample

Question

preetha · Answer

First use the % to calculate the mass of CaCO3 and MgCO3.  Then convert these two masses to moles.  Now you have total moles of CO3 present.
Write the reaction between H2So4 and CO32-
Use the mole ratio from this reaction and calculate moles of sulfuric acid needed to react with the moles of CO3 in the sample
Then, convert the moles of sulfuric acid to g of sulfuric acid.
The solution is 30% strength.  So calculate how many g of solution areneeded to give you the moles of sulfuric acid you need.
It seems long, but you should just work through it step by step.