science
posted by Kelly .
show me step by step how to balance
2 H3(PO4)(aq) + 3 CaCl2(aq)

You 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
Respond to this Question
Similar Questions

Chemistry
Using the change in oxidation number method, balance the redox reaction shown below. (NO2^2)+ (MnO4^)> (NO3^)+ Mn^2+ Divide into half reactions. I will show you how to do MnO4^ and you do the other one. MnO4^ ==> Mn^+2 … 
chemistry
How would I go about doing this question, can someone explain it step by step please, my answer I keep getting is 1.17m CaCl2, but the answer is 1.35m CaCl2? 
Physics
I'm trying to rearange this 0 = Xo + 2^1 a t^2 for t I've been told that it is (a^1 2x)^(2^1) but I do not see how please show me step by step how you get that 0  Xo = Xo  Xo + 2^1 a t^2 (Xo = 2^1 a t^2) a^1 2 (a^1 (2Xo) … 
Chemistry
Consider the following chemical equation. Na3PO4(aq) + Ca(OH)2(aq) → Ca3(PO4)2(s) + NaOH(aq) How many grams of calcium hydroxide must react to give 2.81 g of Ca3(PO4)2? 
Physics
Can someone please show me step by step how to normalize e^5x in the interval (0, infinity)? 
Chemistry
If the molality of a CaCl2 solution is .100 mol/kg, and was made from 500.0 mL of water, how many grams of CaCl2 were needed to make the solution? 
ALGEBRA HELP
When solving the equation, what property was used to go from step 3 to step 4? 
Algebra 1StepbyStep
Can someone show me how to solve these stepbystep? 
chemistry step by step for me thank a lot
What is the weight of ca(oh)2 required for 10 litre of water remove temporary hardness of 100 ppm due to ca(H03)2 The answer 0.74 Thank all tutors for your help Pls show step by step for me 
Chemistry
step by step, show how to balance C2H5OH + K2Cr2O7 + H2SO4 = Cr2(SO4)3 + K2SO4 + CH3COOH + H2O