Answer to Question #104552 in General Chemistry for Grace

Question

You want to make an aqueous solution of 0.5M MgI. You have 2L of water.
How many grams of MgI will you need to dissolve into it?


Later on in your experiment, you need a 0.1M solution of MgI. How much water should you add to the 2L of MgI solution?

Answer 1

0.5 x 2 = 1 mol and 1 x 151 = 151 g of MgI.

We need to add 8 L water to the 2 L of MgI solution.