Question

I hate to put questions in the wrong category, but I have a test coming up, and I don't understand how to do limiting reactants!

2 AgNo3 + Ni --> 2Ag + Ni(NO3)2

A manufacturer has 40 moles of Ni and 30 moles of AgNO3. Assume that the max amount of Ag is produced from these two reactants.

a. What is the limiting reactant?
b. Which reactant will be left over?
c. How many moles of silver will be produced?

Answer 1

I used to know how to do it :DD

Answer 2

Look, you have 40 moles of Ni and you only need 1 to produce 2 Ag. So 40x2=80 Ag is produce.
30 moles of AgNO3 and you need 2 to produce 1 Ag. So 30/2=15 x2=30 Ag produce.

So now which one is the limiting and which one will have left over

Answer 3

I'm still a little confused

Answer 4

Ok, let's look at Ni. If u look at ur balanced equation, it shows you need 1 mole of Ni to make 2 Ag. Since u have 40 moles of Ni, u can make 2x40 moles of Ag, or 80

Answer 5

Look at ur AgNO3 now. U need 2 moles of those in order to produce 2 moles of Ag. Since u have 30 moles, u divide that by 2 because each reaction requires 2, so u can make 15 of these reactions. And 15 reactions, each producing 2 Ag means 15x2 or 30 for the total amount of Ag produce

Answer 6

Since 40 moles of Ni produce 80 moles of Ag, and 30 moles of AgNO3 only produces 30 moles of Ag, AgNO3 would be ur limiting reactant and u will have some Ni left over

Answer 7

thanks (: