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The following results were obtained for the reaction between bromate(V) ions, bromide ions and hydrogen ions in aqueous solution. BrO3−(aq) + 5 Br−(aq) + 6 H+(aq) → 3 Br2(aq) + 3 H2O(l) Which row gives the order of reaction with respect to BrO3−,…
The container holding the equilibrium mixture below is compressed to half its volume while the temperature is kept constant. Which row gives the change in the amount of PCl5 and the effect on the equilibrium constant, K?…
What amount of oxygen, in mol, is required to burn 8.72 g of butane, C4H10(g), completely? M(butane) = 58.14 g mol−1 A. 0.0231 B. 0.150 C. 0.975 D. 1.95
The reaction between sodium thiosulfate and hydrochloric acid was carried out at several temperatures to determine its activation energy. A graph of ln k against was plotted from the processed data, and the gradient of the line of best fit…
What is the conjugate acid of the hydrogen phosphate ion, HPO42−? A. PO43− B. H2PO4− C. H3PO4 D. HPO32−
What is the pH of a 0.020 mol dm−3 solution of nitric acid, HNO3(aq)? A. 1.0 B. 1.7 C. 2.0 D. 12.3
Which two species can act both as Brønsted–Lowry acids and as Brønsted–Lowry bases? A. H2CO3 and CO32− B. HCO3− and SO32− C. HCO3− and HSO3− D. H2SO3 and HSO3−
Which solution has a pH of 11.0 at 298 K? A. 10−3 mol dm−3 KOH(aq) B. 10−11 mol dm−3 KOH(aq) C. 10−3 mol dm−3 NH3(aq) D. 10−3 mol dm−3 HCl(aq)
Which of these solutions has a pH greater than 7 at 25 °C? A. [H+] = 1.0 × 10−5 mol dm−3 B. [OH−] = 1.0 × 10−10 mol dm−3 C. [H3O+] = 1.0 × 10−11 mol dm−3 D.…
A solution has a pH of 4.0 at 298 K. What is the hydroxide ion concentration, [OH−], in mol dm−3? A. 10 B. 10−4 C. 10−10 D. 10−18