of is reacted with of water. The molarity of formed is: — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
$2.3\text{ g}$ of $Na$ is reacted with $100 \text{ mL}$ of water. The molarity of $NaOH$ formed is:
Answer: A
💡 Solution & Explanation
$\text{Moles } Na = 2.3 / 23 = 0.1$. <br>$Na + H_2O \rightarrow NaOH + 0.5 H_2$. <br>$\text{Moles } NaOH = 0.1$. <br>$\text{Molarity} = 0.1 \text{ mol} / 0.1 \text{ L} = 1 \text{ M}$.
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