Which symbol equation represents the reaction between aqueous sodium hydroxide and dilute sulfuric acid?
A.
\(\mathrm{Na}_{2} \mathrm{OH}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow 2 \mathrm{NaSO}_{4}+\mathrm{H}_{2} \mathrm{O}\)
B.
\(\mathrm{Na}(\mathrm{OH})_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+2 \mathrm{H}_{2} \mathrm{O}\)
C.
\(2 \mathrm{NaOH}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow 2 \mathrm{NaSO}_{4}+2 \mathrm{H}_{2} \mathrm{O}\)
D.
\(2 \mathrm{NaOH}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+2 \mathrm{H}_{2} \mathrm{O}\)
Exam No：0620_w24_qp_12 Year：2024 Question No：9
Answer:
D
Knowledge points:
7.3.1.1. an alkali by titration
7.3.1.2. excess metal
7.3.1.3. excess insoluble base
7.3.1.4. excess insoluble carbonate
7.3.2.1. sodium, potassium and ammonium salts are soluble
7.3.2.2. nitrates are soluble
7.3.2.3. chlorides are soluble, except lead and silver
7.3.2.4. sulfates are soluble, except barium, calcium and lead
7.3.2.5. carbonates are insoluble, except sodium, potassium and ammonium
7.3.2.6. hydroxides are insoluble, except sodium, potassium, ammonium and calcium (partially)
7.3.3. Define a hydrated substance as a substance that is chemically combined with water and an anhydrous substance as a substance containing no water
7.3.4. Describe the preparation of insoluble salts by precipitation
7.3.5. Define the term water of crystallisation as the water molecules present in hydrated crystals
Solution:
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