Sodium oxide reacts with water to produce sod | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The balanced chemical equation is: $Na_{2}O + H_{2}O ightarrow 2 NaOH$Molar mass of $Na_{2}O = (2 	imes 23.0) + 16.0 = 62.0 \ g/mol$.Moles of $

Vedclass · Accepted Answer

$13$

Vedclass · Answer

(B) The balanced chemical equation is: $Na_{2}O + H_{2}O ightarrow 2 NaOH$Molar mass of $Na_{2}O = (2 	imes 23.0) + 16.0 = 62.0 \ g/mol$.Moles of $Na_{2}O = \frac{20.0 \ g}{62.0 \ g/mol} = 0.3226 \ mol$.According to the stoichiometry,$1 \ mol$ of $Na_{2}O$ produces $2 \ mol$ of $NaOH$.Moles of $NaOH$ formed $= 2 	imes 0.3226 \ mol = 0.6452 \ mol$.Volume of solution $= 500 \ mL = 0.5 \ L$.Molarity of $NaOH = \frac{0.6452 \ mol}{0.5 \ L} = 1.2904 \ M$.Expressing in terms of $10^{-1} \ M$: $1.2904 \ M = 12.904 	imes 10^{-1} \ M$.Rounding to the nearest integer,we get $13 	imes 10^{-1} \ M$.

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 $........ \times 10^{-1} \ M.$ (Nearest integer)
[Atomic mass $: Na=23.0, O=16.0, H=1.0]$

Similar Questions

The heat of combustion of methane is given by the following equation. How many grams of methane are required to produce $445 \ kJ$ of heat (in $g$)?
$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O \ (\Delta H = -891 \ kJ/mol)$

For what ratio of volumes should $0.4 \, M \ HCl$ and $0.9 \, M \ HCl$ be mixed to obtain a solution of $0.7 \, M \ HCl$?

What is obtained when one mole of calcium phosphide is reacted with excess water?

$15 \ mL$ of $0.2 \ N$ alkali is required to complete neutralization of $30 \ mL$ acid solution. The concentration of the acid solution is ..... $N$.

For preparing a $0.1 \ N$ solution of a compound from its impure sample,where the percentage purity is known,the weight of the substance required will be:

Vedclass Test Series

Exam Paper Generator

Online Exam Module

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 $........ \times 10^{-1} \ M.$ (Nearest integer)[Atomic mass $: Na=23.0, O=16.0, H=1.0]$