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. Set of isoelectronic species is
2. Alum in dyeing of clothes is used as
3. The presence of colloidal particles can be confirmed with the help of
4. Hydrolytic reaction of fats, with caustic soda, is known as
5. Which of the following reacts with chloroform and a base to form phenylisocyanide

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