Question
(e) The potassium sulfate solution has 0.86 g of potassium sulfate dissolved in 25cm^2 water. Calculate the mass of potassium sulfate needed to make 1.0dm^3 of solution. __
Answer
4.6
(323 Votes)
Clara
Professional · Tutor for 6 years
Answer
34.4 g
Explanation
We are given that 0.86g of potassium sulfate is dissolved in 25 cm^3 (or 0.025 dm^3) of water. We need to find the mass of potassium sulfate needed to make 1.0 dm^3 of solution also known as molar mass. To calculate this, we would first find out the mass for 1 dm^3 from the given mass for 0.025 dm^3 by setting up and solving a simple ratio to scale the mass up from 0.025 dm^3 to 1 dm^3.