ICSEClass XChemistryAcids, Bases and Salts02 Mark2023 Moderate

QQuestion

Differentiate between the following pairs based on the criteria given in the brackets:

(a) Cane sugar and hydrated copper sulphate [using concentrated H2SO4]

(b) Sulphuric acid and hydrochloric acid [type of salts formed]

Exam-ready answer 02 Mark

Answer

(a) Cane sugar is dehydrated by concentrated sulphuric acid and turns black due to carbon formation:

\mathrm{C_{12}H_{22}O_{11}\xrightarrow{\text{conc. }H_2SO_4}12C+11H_2O}

Hydrated copper(II) sulphate changes from blue to white anhydrous copper(II) sulphate.

(b) Sulphuric acid forms sulphate salts, whereas hydrochloric acid forms chloride salts.

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