A 216 mL sample of gas is at STP. What volume will it occupy at 975 torr?

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afinn2313

22.11.2020

Chemistry

C) $\text{HCl}$ hydrochloric acid and, in case that the question allows for more than one choices, D) $\text{CO}_2$ carbon dioxide as well.

Methane molecules $\text{CH}_4$ are nonpolar and barely dissolve in water.

Sodium hydrocarbonate $\text{Na}\text{HCO}_3$ undergoes hydrolysis to release hydroxide ions $\text{OH}^{-}$ that can end up consuming $\text{H}^{+} \; (aq)$ :

$\text{NaHCO}_3 \; (aq) \to \text{Na}^{+} \; (aq) + \text{HCO}_3^{-} \; (aq)\\\text{HCO}_3^{-} \; (aq) + \text{H}_2\text{O} \; (l) \leftrightharpoons \text{H}_2\text{CO}_3\; (aq) + \text{OH}^{-} \; (aq)$

Hydrochloric acid, a strong acid, ionizes to produce protons $\text{H}^{+} \; (aq)$ and chloride ions when dissolved in water:

$\text{HCl}\; (aq) \to \text{H}^{+} \; (aq) + \text{Cl}^{-} \; (aq)$

Carbon dioxide reacts with water to produce hydrocarbonic acid, a weak acid that slightly ionizes, also producing protons $\text{H}^{+} \; (aq)$ but to a significantly lesser extent than hydrochloric acid does.

$\text{CO}_2\; (g) + \text{H}_2\text{O} \; (l) \leftrightharpoons \text{H}_2\text{CO}_3\; (aq)\\\text{H}_2\text{CO}_3\; (aq) \leftrightharpoons \text{H}^{+}\; (aq) + \text{HCO}_3^{-} \; (aq)$

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