What is the weight percent of a potassium iodide [KI] solution that is made by dissolving 47.2 grams of KI in 152.8 grams of water?

% w/w = (grams solute/grams solution) x 100 = ?

To find the weight percent of a potassium iodide (KI) solution, you need to calculate the weight of the KI dissolved in the solution and then express it as a percentage of the total weight of the solution.

Step 1: Calculate the weight of KI in the solution.
The weight of KI is given as 47.2 grams.

Step 2: Calculate the total weight of the solution.
The weight of water is given as 152.8 grams.

Total weight of the solution = weight of KI + weight of water
Total weight of the solution = 47.2 grams + 152.8 grams = 200 grams

Step 3: Calculate the weight percent.
Weight percent = (weight of KI / total weight of the solution) × 100

Weight percent = (47.2 grams / 200 grams) × 100

Weight percent = 23.6%

Therefore, the weight percent of the potassium iodide (KI) solution is 23.6%.