1 Balance the equation
2.Note the coefficient for Calcium hydroxide and hydrochloric acid and find the ratio
3.Find the moles of Calcium hydroxide and hydrochloric acid from the given mass (grams/molar mass) and then compare this ratio to what you got in 2. The limiting reactant will be the one that is smaller than expected.
4. Use the moles from the limiting reactant to calculate the moles of the product, using the coefficients from the balanced equation.
5. Also using the moles of the limiting reactant and the mole ratio (coefficients) from the balanced equation, find how much of the excess reactant is consumed.
6. Subtract the answer from 5. from the given mass from the excess reactant to get what's left over.
You might need some clarifications on some of these steps so go ahead and follow up with such.