1) The molarity of a solution obtained by mixing 750 ml. of 0.5 (M) HCl with 250 ml of 2(M) HCl will be A) 0.875 M B) 1.00 M C) 1.75 M D) 0.0975 M Answer: Option AExplanation:$M_{f}=\frac{M_{1}V_{1}+M_{2}V_{2}}{V_{1}+V_{2}}$ $=\frac{750\times0.5+250\times2}{750+250}=\frac{875}{1000}$ =0.875 M
