Question

SOMEONE PLEASE HELP ME! MEDAL, FAN, AND TESTIMONIAL

K3PO4 + Al(NO3)3 → 3KNO3 + AlPO4

How many moles of potassium nitrate are produced when 2.5 moles of potassium phosphate react?


Round final answers to the tenth position, one place after the decimal. Please remember your units.

Answer 1

1 moles C3H8.
5) K3PO4 + Al(NO3)3 → 3 KNO3 + AlPO4 How many moles of potassium nitrate are produced when two moles of potassium phosphate react with two moles of aluminum nitrate? 2 moles K3PO4.
Unit 10A Stoichiometry Notes
www.lcps.org/cms/lib4/.../Notes%20Unit%2010A%202013%20KEY.pdf

Answer 2

\[\text{K}_3\text{PO}_4 + \text{Al(NO}_3\text{)}_3 → 3\text{KNO}_3 + \text{AlPO}_4\]

You can read off the ratios of moles in : moles out by looking at the coefficients in the balanced reaction equation. For example, here we have aluminum nitrate and aluminum phosphate, both with no coefficient listed, which means the coefficient is 1. For every 1 mole of aluminum nitrate reacted, 1 mole of aluminum phosphate is produced.

Notice that the potassium compounds here have different coefficients. That means we will end up with a different number of moles of the product (right hand side of the arrow) than we had of the reactant (left hand side of the arrow). You can find the number of moles of product by this:

moles of product = (coefficient of product/coefficient of reactant) * moles of reactant

Answer 3

So you have the moles of Potassium phosphate (K3PO4) which is 2.5mol.

So using this amount of moles, you can look at the stoichiometry in the equation to easily work out the number of moles of potassium nitrate.
There is 1 lot of K3SO4 (No number in front of the element means there is 1 of it), and there is 3 lots of KNO3.

If ONE mole of potassium phosphate is 2.5mol, and KNO3 has a THREE in front of it, all we have to do is times the amount of moles we have been given (which remember, is for 1) by 3 (because there is a 3 in front of KNO3, and that's what we need it for).

So, 2.5 x 3 = 7.5mol of KNO3

Another example is if we wanted to know the amount of moles for lets say, AlPO4 (in the equation), the amount of moles of that would be 2.5, because there is ONE lot of that substance in the equation.

So, because there is THREE lots of KNO3, we needed to times the amount of moles for ONE lot of substance by THREE to come up with the correct answer.

I tried to make it sound a bit more simple. I hope this helps :)