Friday

July 25, 2014

July 25, 2014

Posted by **Kelly** on Tuesday, May 13, 2014 at 8:28pm.

2 H3(PO4)(aq) + 3 CaCl2(aq)

- science -
**DrBob222**, Tuesday, May 13, 2014 at 8:44pmYou can add the phases. You have it partly balanced but I am removing the 2 and 3 and start over.

First you write the products (and that isn't considered part of the balancing).

H3PO4(aq) + CaCl2(aq) ==> Ca3(PO4)2 + HCl

You do these by trial and error; basically that means you try a number and if that doesn't work you try another. However, you can help that hit ans miss method by asking yourself the right questions as you go along. Here we go. I look at the equation and immediately I see we have 3 Ca on the right. So let's place a 3 for Ca on the left.

H3PO4(aq) + 3CaCl2(aq) ==> Ca3(PO4)2 + HCl

Then I see on the right I need 2 PO4 so let's add a 2 for PO4 on the left.

2H3PO4(aq) +3CaCl2(aq) ==> Ca3(PO4)2 + HCl

So now I know the H3PO4 on the left and CaCl2 on the left as well as the Ca3(PO4)2 on the right are balanced. So I ask myself how many H and how many Cl do I have on the left? That's 6 so we make that balanced on the right with 6

KCl.

2H3PO4(aq) + 3CaCl2(aq) ==> Ca3(PO4)2 + 6HCl

**Related Questions**

Chemistry - Consider the following chemical equation. Na3PO4(aq) + Ca(OH)2(aq...

Chemistry - If the molality of a CaCl2 solution is .100 mol/kg, and was made ...

Algebra 1--Step-by-Step - Can someone show me how to solve these step-by-step? ...

ALGEBRA HELP - When solving the equation, what property was used to go from step...

Physics - I'm trying to rearange this 0 = Xo + 2^-1 a t^2 for t I've been told ...

chemistry - How would I go about doing this question, can someone explain it ...

Physics - Can someone please show me step by step how to normalize e^-5x in the ...

Chemistry - Using the change in oxidation number method, balance the redox ...

Quick math help - In which step below does a mistake first appear in simplifying...

Algebra help - f(x)=x^3-4x^2-x+4 How do I find the x-intercept for this? This is...