Ethanal, CH3CHO, is used to make product R in a three-stage synthesis. CH3CHO →product P (HCN/NaCN) →product Q (H2SO4(aq), reflux) →product R (conc. H2SO4 (a few drops)) Two molecules of Q react to give one molecule of R plus two molecules of water. R has two ester functional groups in each molecule. R does not react with sodium. What is the empirical formula of R?

Butanedioic acid may be synthesised in two steps from 1,2-dibromoethane. BrCH₂CH₂Br --step 1--> X --step 2--> HO₂CCH₂…

Which syntheses will be successful? 1 CH₃CH₂CH₃ from CH₃CH=CH₂ + LiAlH₄ 2 CH₃CH(OH)CH₃ from CH₃COCH₃ + NaBH₄ 3 CH₃CH₂…

The ester C2H5CO2CH2CH2CH3 can be made in a school or college laboratory by a sequence of four reactions or fewer usi…

The rate of chemical reactions can be increased by the addition of a suitable catalyst. For which reactions can a het…

Which chlorides, when added to water, can produce a solution with a pH of less than 5? 1 SiCl₄ 2 AlCl₃ 3 MgCl₂

Acid rain continues to be a problem. Which statements about acid rain are correct? 1 Acid rain is formed when oxides …