Why am I getting 0.0761 M when mixing two solutions?

[carlodelmundo]

Homework Statement

http://carlodm.com/images/1.png

Homework Equations

I tried using the formula: ( C₁V₁ + C₂V₂ ) / (V₁ + V₂)

The Attempt at a Solution

I keep on getting .0761 M. anything wrong with this? (YES I changed mL to L)

 

[symbolipoint]

The expression for the resulting formula looks good. Be aware that one formula unit of Na₂SO₄ , sodium sulfate, has two formula units of Na for each unit of compound.

 

[carlodelmundo]

THANK YOU!

That solved my problem!