What mass of water is needed to prepare 148 grams of 12.0% (m/m) KHCO₃ solution?

Question

Quizplus · Accepted Answer

A 12.0% (m/m) solution means that there are 12 grams of solute (in this case, KHCO₃) in every 100 grams of solution. To find the mass of water needed, we first determine the mass of the solute in the 148 grams of solution. 12% of 148 grams is 17.76 grams (which is approximately the mass of KHCO₃). To find the mass of water, subtract the mass of the solute from the total mass of the solution: 148 grams - 17.76 grams = 130.24 grams, which is approximately 130 grams.

What Mass of Water Is Needed to Prepare 148 Grams