Q2. Calculate the pH of a 6.73 x 10 M H3PO4 (phosphoric pH = -log[H] Molar mass H3PO4=97.994 mol acid) solution. Density H3PO4= 1.88 ml

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**Q2.** Calculate the pH of a 6.73 x 10^-4 M H₃PO₄ (phosphoric acid) solution.

\[
\text{pH} = -\log[\text{H}^+]
\]

Molar mass H₃PO₄ = 97.994 \(\frac{\text{g}}{\text{mol}}\)

Density H₃PO₄ = 1.88 \(\frac{\text{g}}{\text{mL}}\)

---

**Q3.** Calculate the [H⁺] (concentration of the H⁺) of an HCl solution when the pH = 2.88

\[
\text{pH} = -\log[\text{H}^+]
\]

**Hint to solve Q3:** antilog

Molar mass HCl = 36.458 \(\frac{\text{g}}{\text{mol}}\)

Density HCl = 1.18 \(\frac{\text{g}}{\text{mL}}\)
Transcribed Image Text:**Q2.** Calculate the pH of a 6.73 x 10^-4 M H₃PO₄ (phosphoric acid) solution. \[ \text{pH} = -\log[\text{H}^+] \] Molar mass H₃PO₄ = 97.994 \(\frac{\text{g}}{\text{mol}}\) Density H₃PO₄ = 1.88 \(\frac{\text{g}}{\text{mL}}\) --- **Q3.** Calculate the [H⁺] (concentration of the H⁺) of an HCl solution when the pH = 2.88 \[ \text{pH} = -\log[\text{H}^+] \] **Hint to solve Q3:** antilog Molar mass HCl = 36.458 \(\frac{\text{g}}{\text{mol}}\) Density HCl = 1.18 \(\frac{\text{g}}{\text{mL}}\)
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