Friday
November 28, 2014

Homework Help: chemistry

Posted by Hawk on Wednesday, June 21, 2006 at 6:14pm.

2Na3PO4 + 3CaCl2 ----> Ca3 (PO4)2 + 6NaCl

how many moles of CaCl2 remain if .10 mol Na3PO4 and .40 mol CaCl2 are used?


When amounts of both materials are listed one must worry about which is the limiting reagentalthough the problem seems to suggest that Na3PO4 is the limiting reagent. We can take them in order. I don't have great eye sight but I think your numbers are 0.10 mol Na3PO4 and 0.40 mol CaCl2.

0.10 mol Na3PO4 x [3 mol CaCl2/2 mol Na3PO4] =0.15 mol CaCl2 and that subtracted from 0.40 = 0.25 mol CaCl2 remaining. You can check this out; all of the Na3PO4 should have been used and it is the limiting reagent.

0.40 mol CaCl2 x [2 mol Na3PO4/3 mol CaCl2 = 0.267 mol Na3PO4. We didn't have that much initially; therefore, all of it must have been consumed. I hope this helps.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - Identify the balanced net ionic equation for the reaction 2Na3PO4(aq...
Chemistry - If 0.0142 M aqueous Cl- is produced stoichiometrically according to ...
Chemistry - 3Ca(NO3)2(aq)+2Na3PO4(aq)->Ca3(PO4)2(s)+6NaNO3(aq) A.)the moles ...
chemistry(Please Check) - CaCl2(aq)+Na3PO4(aq) -----------> Ca3(PO4)2(s) +...
chemistry - 3CaCl2+2Na3PO4 -----------> 1Ca3(PO4)2+6NaCl Did I correctly ...
Chemistry - 3Ca(NO3)2(aq)+2Na3PO4(aq)->Ca3(PO4)2(s)+6NaNO3(aq) (a) the grams ...
Chemistry - Equation: 3CaCl2 (aq) + 2 Na3PO4 (aq) → Ca3(PO4)2 (s) + 6 NaCl...
Chemistry - Write the net ionic equation for this reaction occurring in water: ...
Chemistry - How many moles of K3PO4 are required to react completely with 4.5 ...
Chemistry - 1. Ca(OH)2 + H3PO4 ---> H2O + Ca3(PO4)2 (A) How many moles of ...

Search
Members