Question

Which is the correct mole ratio of k3po4 to kno3 in the chemical reaction mg(no3)2 + k3po4 ®mg3(po4)2 + kno3?

Answer 1

3Mg(NO3)2 + 2K3PO4 ---> Mg3(PO4)2 + 6KNO3

n(K3PO4):n(KNO3)=2:6=1:3
n(K3PO4):n(KNO3)=1:3

Answer 2

1 : 3

Step-by-step explanation:

First we right out the balanced chemical equation

`3Mg(NO_(3) )_(2) +2K_(3)PO_(4) --->  Mg_(3) (PO_(4) )_(2)+6KNO_(3)`

Then from there we use the stoichiometric coefficients to write the molar ratios:

`n(K_(3) PO_(4) ): n(KNO_(3) ) = 2:6=1:3`