Question

What is the concentration of HCL if, 7mL of 2M HCL are added into 3mL of H2O?

Answer 1

\[7 ml hcl (\frac{2 mol hcl}{1000 ml hcl})=.014 mole HCL\]

now that we have found the moles of HCL present lets add the total ml of solution and divide by L to find the concentration

\[\frac{.014 mole HCL}{.01 L}=1.4 M HCL\]