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The forward reaction is first order with respect to cyclohexane. C6H12(g) ⇌ C6H6(g) + 3 H2(g) (i) Sketch a graph showing how the rate varies with the concentration of cyclohexane. (ii) Deduce the reaction's rate equation, and state the units of the…
A compound used to make polymers, hexanedioic acid, can be produced by a series of reactions starting from cyclohexane. (i) Deduce how reactant A is related to hex-1-ene. (ii) For the C=O functional group present in intermediate C, state its structural…
Hexanoic acid, CH3(CH2)4COOH, is a weak acid. The graph shows how the pH changes during the titration of a 20.0 cm3 aqueous solution of hexanoic acid with aqueous sodium hydroxide. (i) Deduce an expression for the equilibrium constant, K,…
(i) Describe how aqueous hexanoic acid and aqueous sodium hydroxide could be used to make a buffer solution. (ii) Predict the effect on the buffer's pH of adding a small amount of water.
(i) Hexanedioic acid reacts with hexane-1,6-diamine, H2N(CH2)6NH2. State the type of polymer that is formed. (ii) Draw one repeating unit of the polymer's structure.
4.06 g of hydrated magnesium chloride, MgCl2 ⋅ 6 H2O (Mr = 203), is dissolved in water to make 0.250 dm3 of solution. What is the concentration of chloride ions, in mol dm−3, in this solution? A. 0.0400 B. 0.0800 C.…
Below is the infrared spectrum recorded for ester Y. (i) This spectrum contains two peaks that confirm Y is an ester. Deduce their identity, giving the wavenumber and the bond responsible for each. Use section 20 of the data booklet. (ii) Alcohols and…
In the mass spectrum of Y, the molecular ion peak appears at m/z 88. (i) Y contains no multiple carbon–carbon bonds and no rings. Deduce its molecular formula. Use section 7 of the data booklet. Shown below is the high-resolution NMR spectrum of Y,…
0.30 dm3 of nitrogen is mixed with 0.60 dm3 of hydrogen and the mixture reacts as completely as possible. All gas volumes are measured at the same temperature and pressure. N2(g) + 3 H2(g) → 2 NH3(g) What volume of ammonia, in…
Describe the setup that would connect the Sn4+/Sn2+ half-cell to a second half-cell for comparing the two electrode potentials.