DP Chemistry Questionbank

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• 18M.2.hl.TZ2.2d.ii: Calculate the pH of 0.100 mol dm−3 aqueous ethanoic acid. Ka = 1.74 × 10−5
• 18M.2.hl.TZ1.5d: Determine the pH of 0.010 mol dm−3 2,2-dimethylpropanoic acid solution. Ka...
• 18M.1.hl.TZ2.27: What is the order of increasing acidity? A.     HClO < CH3CH2COOH < HF < HIO3 B.   ...
• 17N.2.hl.TZ0.6c.ii: Calculate Kb for HCO3– acting as a base.
• 17N.2.hl.TZ0.6c.i: Calculate [H3O+] in the solution and the dissociation constant, Ka , of the acid at 25 °C.
• 17M.2.hl.TZ2.8c: The pKa of an anthocyanin is 4.35. Determine the pH of a 1.60 × 10–3 mol dm–3 solution to two...
• 17M.1.hl.TZ2.27: What is the order of increasing acidity of the following acids? A.     chloroethanoic <...
• 17M.2.hl.TZ1.5d.i: Hydrazine reacts with water in a similar way to ammonia. (The association of a molecule of...
• 16N.2.hl.TZ0.7a: Calculate the pH of 0.0100 mol dm–3 methanoic acid stating any assumption you make. Ka = 1.6 ×...
• 16M.2.hl.TZ0.2d: Phenylamine can act as a weak base. Calculate the pH of a 0.0100 mol dm−3 solution of phenylamine...
• 15M.1.hl.TZ1.26: The forward reaction of this equilibrium is...
• 15M.1.hl.TZ1.27: Which equation represents a reaction for which a base dissociation constant expression,...
• 15M.1.hl.TZ2.26: The strengths of four acids are:      glycine     \({\text{p}}{K_{\text{a}}} =...
• 15M.2.hl.TZ1.8b: Calculate the pH, using table 15 of the data booklet, of a solution of ethanoic acid made by...
• 14M.1.hl.TZ1.26: The \({\text{p}}{K_{\text{b}}}\) of \({\text{H}}{{\text{S}}^ - }\) is 7.08. What is its conjugate...
• 14M.1.hl.TZ2.29: What is the expression for the ionic product constant of water, \({K_{\text{w}}}\)? A.    ...
• 14M.2.hl.TZ1.7c.iv: A \({\text{1.50 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) solution of ammonia is added to...
• 14M.2.hl.TZ1.7c.v: Calculate the pH of the solution at the equivalence point, using Table 15 of the Data Booklet.
• 14M.2.hl.TZ2.6e.ii: Sulfur dioxide, a major cause of acid rain, is quite soluble in water and the equilibrium shown...
• 14M.3.hl.TZ1.24b: The \({\text{p}}{K_{\text{b}}}\) values at 298 K for diethylamine and triethylamine are given in...
• 14N.1.hl.TZ0.26: Which compound will produce an aqueous solution which has a pH greater than 7? A.    ...
• 14N.1.hl.TZ0.27: Methylamine acts as a weak base when it reacts with water. For a diluted aqueous solution, what...
• 14N.2.hl.TZ0.1d: Determine the concentration of hydroxide ions in the sample of river water.
• 14N.2.hl.TZ0.4c: Phosphoric(V) acid, \({{\text{H}}_{\text{3}}}{\text{P}}{{\text{O}}_{\text{4}}}\), has a...
• 14N.2.hl.TZ0.10e: (i)     State a chemical equation for the partial dissociation of water into ions, including...
• 13N.1.hl.TZ0.28: The table below shows data for the \({{K_{\text{a}}}}\) and \({{\text{p}}{K_{\text{b}}}}\) values...
• 13N.2.hl.TZ0.7e.ii: Francisco and Shamiso found that the pH of the initial...
• 13M.1.hl.TZ1.26: The values of \({K_{\text{w}}}\), the ionic product constant of water, are: Which statements...
• 13M.1.hl.TZ1.27: For which equilibrium can an expression for a base dissociation constant, \({K_{\text{b}}}\), for...
• 13M.1.hl.TZ2.28: The \({\text{p}}{K_{\text{b}}}\) value of ammonia is 4.75 at 298 K. What is the...
• 13M.1.hl.TZ2.29: The \({K_{\text{a}}}\) values of four weak acids W, X, Y and Z are listed below. W    ...
• 13M.2.hl.TZ2.6a: Ammonia, NH3, can be used to clean ovens. The concentration of hydroxide ions, OH–(aq), in a...
• 13M.2.hl.TZ2.6d.iii: \({\text{150 c}}{{\text{m}}^{\text{3}}}\) of...
• 10N.2.hl.TZ0.6b: (i)     Distinguish between the terms strong and weak acid and state the equations used to show...
• 09N.2.hl.TZ0.8a.iii: Calculate the concentration of the weak acid before the addition of any NaOH(aq).
• 09N.2.hl.TZ0.8e.i: Determine the pH of the solution.
• 09N.2.hl.TZ0.8e.ii: Calculate the base dissociation constant, \({K_{\text{b}}}\), for ammonia.
• 10M.2.hl.TZ1.3d.i: State an equation for the reaction of ethanoic acid with water.
• 10M.2.hl.TZ1.3d.ii: Calculate the pH of \({\text{0.200 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) ethanoic acid...
• 09M.1.hl.TZ1.29: What is the approximate pH of a \({\text{0.01 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) ammonia...
• 09M.2.hl.TZ1.2a.i: State the equation for the reaction of propanoic acid with water.
• 09M.2.hl.TZ1.2a.ii: Calculate the hydrogen ion concentration (in \({\text{mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\)) of...
• 09M.1.hl.TZ2.29: At the same concentration, which acid would have the lowest...
• 09M.1.hl.TZ2.26: \({\text{100 c}}{{\text{m}}^{\text{3}}}\) of a NaOH solution of pH 12 is mixed with...
• 09M.1.hl.TZ2.28: The indicator, HIn is used in a titration between an acid and base. Which statement about the...
• 09M.1.hl.TZ2.27: Ammonia acts as a weak base when it reacts with water. What is the \({K_{\text{b}}}\) expression...
• 09M.2.hl.TZ2.2a.iii: Determine the hydrogen ion concentration and the pH of a...
• 09M.2.hl.TZ2.2a.i: Calculate the \({K_{\text{a}}}\) value of benzoic acid,...
• 09M.2.hl.TZ2.2a.ii: Based on its \({K_{\text{a}}}\) value, state and explain whether benzoic acid is a strong or weak...
• 11M.1.hl.TZ1.28: The \({K_{\text{b}}}\) value for a base is...
• 11M.1.hl.TZ2.27: Based on information in the table below, which acid is the strongest?
• 11M.2.hl.TZ2.5a.iv: Calculate the pH of a...
• 12M.1.hl.TZ2.24: Four aqueous solutions are listed below. W.    ...
• 12M.2.hl.TZ2.8d: A solution of ammonia has a concentration of...
• 11N.1.hl.TZ0.27: Consider the equation for the dissociation of...
• 11N.2.hl.TZ0.4b.ii: Determine the concentration of \({\text{O}}{{\text{H}}^ - }{\text{(aq)}}\), in...
• 11N.2.hl.TZ0.4b.i: The \({\text{p}}{K_{\text{a}}}\) value of HOCl(aq) is 7.52. Determine the \({K_{\text{b}}}\)...
• 11N.2.hl.TZ0.4b.iii: Calculate the pH of the bleach.