Some Basic Concepts Of Chemistry Question 37
Question: 10 mL of 2 M NaOH solution is added to 200 mL of 0.5 M of NaOH solution. What is the final concentration?
Options:
A) 0.57 M
B) 5.7 M
C) 11.4M
D) 1.14M
Show Answer
Answer:
Correct Answer: A
Solution:
[a] From molarity equation $ M _1V _1+M _2V _2=M{V _{(total)}} $ $ 2\times \frac{10}{1000}+0.5\times \frac{200}{1000}=M\times \frac{210}{1000} $ $ 120=M\times 210 $ $ M=\frac{120}{210}=0.57M $
