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Northern IrelandChemistryQuick questions

A2 1 Further Physical and Organic Chemistry

Quick questions on Acid-base equilibria: pH, Ka, titration curves and buffers - CCEA A-Level Chemistry

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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Calculate the pH of 0.10 mol dm−30.10\ \text{mol dm}^{-3} hydrochloric acid. [1 mark]
What is q2?
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State the two components of an acidic buffer solution and write the expression linking [H+][\text{H}^+] to KaK_a. [2 marks]
What is q3?
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A buffer contains 0.20 mol dm−30.20\ \text{mol dm}^{-3} ethanoic acid and 0.20 mol dm−30.20\ \text{mol dm}^{-3} sodium ethanoate (Ka=1.74×10−5K_a = 1.74 \times 10^{-5}). Calculate its pH. [2 marks]

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