(JEE Main 2019) of is dissolved in of water. Molarity of the solution is: (density ) — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
(JEE Main 2019) $8 \text{ g}$ of $NaOH$ is dissolved in $18 \text{ g}$ of water. Molarity of the solution is: (density $= 1.2 \text{ g/mL}$)
Answer: B
💡 Solution & Explanation
$\text{Moles NaOH} = 8/40 = 0.2$. $\text{Total mass} = 8+18 = 26 \text{ g}$. <br>$\text{Volume} = 26 / 1.2 = 21.66 \text{ mL}$. <br>$\text{Molarity} = 0.2 / 0.02166 \approx 9.23 \text{ M}$.
💬Ask on WhatsApp →
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes