Suppose you have 5.00g of powdered magnesium metal, 1.00L of 2.00M potassium nitrate solution, and 1.00L of a 2.00M silver nitrate solution.

a) Which one of the solutions will react with the magnesium
powder?

I don't understand how to go about answering this question at all...

2 answers

Look at the activity series. The Mg will displace the Ag in AgNO3 but will not react with KNO3.
Oh, awesome! I got it now. Thank you so much for your help!