2.5 Litre of 1 M NaOH solution mixed with another 3 litre of 0.5 M NaOH solution.

⇦

⇨

2.5 Litre of 1 M NaOH solution mixed with another 3 litre of 0.5 M NaOH solution. Then find out molarity of resultant solution

Options

(a) 0.80 M
(b) 1.0 M
(c) 0.73 M
(d) 0.50 M

Correct Answer:

0.73 M

Explanation:

Molecular weight of NaOH = 40.
2.5 litre of 1 M NaOH solution contain 40⨯ 2.5 g of NaOH .
3 litre of 0.5 M NaOH solution contain 40 ⨯ 0.5⨯ 3 g of NaOH.
If this two solutions are mixed, the volume of the resultant solution = (2.5 + 3) lit = 5.5 litre.
5.5 litre of the resultant solution contain 40(2.5 + 1.5) g of NaOH.
1 litre of the resultant solution contain
40⨯4/5.5 g of NaOH = 40⨯4/5.5⨯40 mole of NaOH.
The molarity of the resultant solution = 0.727 ≈ 0.73 mol/L.

Related Questions:

1. An isomer of ethanol is
2. Froath floataton proess is used for the concentration of
3. Which of the following acts as an oxidising as well as reducing agent
4. Two miscible liquids can be separated by
5. The number of optical isomers formed by hydrogenation of the compound (CH₃)₂C=CHCH₃

Topics: Solid State and Solutions (91)
Subject: Chemistry (2512)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends