Question

12.0g HCl react with 12.0g NaOH. All of the NaOH is used up when 11.0g of the HCl is used. How much excess reactant is leftover

Answer 1

1 gram HCl

Explanation:

1. This belongs in chemistry
2. You're overlooking the prompt. If NaOH is completely used up, the excess reactant in question is HCl. Since there was originally 12g HCl and 11g is used, there will be 1 gram of it left once all the NaCl is used up.
3. This is a very simple question for any level of chemistry, so you may have forgotten to add something.