What is molarity of a solution obtained after mixing of 750 mL 0.5 M HCl and mL 2 M HCl ?

Options

A. 0.875M
B. `1.00` M
C. 1.75 M
D. 0.975 M

Answer

A

Explanation

`{:(M_(1)=0.5M,M_(2)=2M,M_(3)=?,),(V_(1)=750 mL,V_(2)mL,V_(3)=(750+250)=1000 mL,),(,,,):}`
`M_(3) = (M_(1)V_(1)+M_(2)V_(2))/(V_(3))`
`=((0.5xx750)+(2xx250))/(1000)`
`=(375+500)/(1000) = (875)/(1000) = 0.875M`