Equilibrium Question 451
Question: How many millilitres of $ 6.0M $ hydrochloric acid should be used to prepare $ 150ml $ of a solution which is $ 0.30M $ in hydrogen ion [Pb. PMT 1998]
Options:
A) 3.0
B) 7.5
C) 9.3
D) 30
Show Answer
Answer:
Correct Answer: B
Solution:
$ M_1=6.0 $ M of HCl ; $ V_1=? $
$ M_2 $ =0.30 M is $ {H^{+}} $ concentration in solution. $ V_2= $ 150 ml of solution.
$ M_1V_1=M_2V_2 $ ; $ 6.0\times V_1=.30\times 150 $
$ V_1=\frac{.30\times 150}{6}=7.5 $ ml.
