HL – Page 11 – Vertex Learnbox

M25-CHEM-HL-TZ1-P1A-Q30

The following results were obtained from the acid-catalysed reaction between iodine, \( I_2 \), and propanone, \( CH_3COCH_3 \). Experiment

The acid-catalysed reaction between iodine and propanone was carried out at various temperatures. A graph of \( \ln k \)

A solution has a pH of 3.0. What is the hydroxide ion concentration, \( [OH^{-}] \), in the solution?

The table shows enthalpy of combustion data for several substances: \( C_2H_6 \) is \( -1561 \, kJ \, mol^{-1}

Consider the following system at equilibrium: \( N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g) \) (\( \Delta H_r^{\ominus} = -46 \, kJ

Which two species can be both Br\o nsted-Lowry acids and Br\o nsted-Lowry bases?

Which elements would react with each other most vigorously?

Which statement explains why transition elements have variable oxidation states?

Consider this molecule, deca-3,5,7-triene-2,9-dione. How many stereoisomers are possible for deca-3,5,7-triene-2,9-dione?

What is a disadvantage of using infrared (IR) spectroscopy as a technique?