JEE Main 2021 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2021 (Online) 31st August Evening Shift
Question
Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of water. Neglecting the change in volume, the concentration of the resulting NaOH solution is ______________ 101 M. (Nearest integer) [Atomic mass : Na = 23.0, O = 16.0, H = 1.0]
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Show full solutionCorrect answer: 13
Correct answer
13
Step-by-step explanation
Na2O + H2O 2NaOH
moles
Moles of NaOH formed = 2
[NaOH] = = 1.29 M = 13 101 M (Nearest integer)
moles
Moles of NaOH formed = 2
[NaOH] = = 1.29 M = 13 101 M (Nearest integer)
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