When 1 cm3 of 1 mol dm-3 is added, which of the below shows the smallest change in its pH value? A) 1 mol dm-3 CH3COOH 20 cm3 B) 1 mol dm-3 NaOH 20 cm3 C) Mixture of 1 mol dm-3 CH3COOH 10 cm3 and 1 mol dm-3 CH3COONa 10 cm3 D) 1 mol dm-3 H2SO4 20 cm3 E) Distilled water 20 cm3

Which solution will have the lowest pH?*1 point0.100 mol dm⁻³ NaOH(aq)0.100 mol dm⁻³ HCl(aq)0.100 mol dm⁻³ CH₃COOH(aq)0.100 mol dm⁻³ H₂SO₄(aq)

Four mixtures are added to four separate 50 cm 3 samples of water and stirred.Which mixture results in a solution with the highest pH?201.0 g of aluminium oxide and 1.0 g of aluminium chlorideA1.0 g of magnesium oxide and 1.0 g of magnesium chlorideB1.0 g of phosphorus oxide and 1.0 g of phosphorus chlorideC1.0 g of silicon dioxide and 1.0 g of silicon chloride

5.0 cm3 of 0.050 mol/dm3 sodium carbonate was completely neutralised by 20.00 cm3 of dilute hydrochloric acid. Calculate the concentration in mol/dm3 of the hydrochloric acid.

In Experiment II, 20 cm3 of 0.1 mol/dm3 hydrochloric acid is reacted with excess calcium carbonate. Suggest the concentration of hydrochloric used if the same volume was used for Experiment III.

Which of the following solutions has the lowest pH, assuming equal concentrations of each solution.*1 pointsulfuric acidsodium hydroxidebarium hydroxidepure water