Which of the following mixtures of aqueous solutions reacts to produce a buffer solution?
25.0 cm3 of 0.10 mol dm−3 CH3COOH(aq) and 25.0 cm3 of 0.10 mol dm−3 NaOH(aq)25.0\text{ cm}^3\text{ of } 0.10\text{ mol dm}^{-3}\text{ CH}_3\text{COOH(aq)}\text{ and } 25.0\text{ cm}^3\text{ of } 0.10\text{ mol dm}^{-3}\text{ NaOH(aq)}25.0 cm3 of 0.10 mol dm−3 CH3COOH(aq) and 25.0 cm3 of 0.10 mol dm−3 NaOH(aq)
25.0 cm3 of 0.10 mol dm−3 CH3COOH(aq) and 12.5 cm3 of 0.10 mol dm−3 NaOH(aq)25.0\text{ cm}^3\text{ of } 0.10\text{ mol dm}^{-3}\text{ CH}_3\text{COOH(aq)}\text{ and } 12.5\text{ cm}^3\text{ of } 0.10\text{ mol dm}^{-3}\text{ NaOH(aq)}25.0 cm3 of 0.10 mol dm−3 CH3COOH(aq) and 12.5 cm3 of 0.10 mol dm−3 NaOH(aq)
25.0 cm3 of 0.10 mol dm−3 HCl(aq) and 12.5 cm3 of 0.10 mol dm−3 NH3(aq)25.0\text{ cm}^3\text{ of } 0.10\text{ mol dm}^{-3}\text{ HCl(aq)}\text{ and } 12.5\text{ cm}^3\text{ of } 0.10\text{ mol dm}^{-3}\text{ NH}_3\text{(aq)}25.0 cm3 of 0.10 mol dm−3 HCl(aq) and 12.5 cm3 of 0.10 mol dm−3 NH3(aq)
25.0 cm3 of 0.10 mol dm−3 CH3COONa(aq) and 25.0 cm3 of 0.10 mol dm−3 NaOH(aq)25.0\text{ cm}^3\text{ of } 0.10\text{ mol dm}^{-3}\text{ CH}_3\text{COONa(aq)}\text{ and } 25.0\text{ cm}^3\text{ of } 0.10\text{ mol dm}^{-3}\text{ NaOH(aq)}25.0 cm3 of 0.10 mol dm−3 CH3COONa(aq) and 25.0 cm3 of 0.10 mol dm−3 NaOH(aq)