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Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts2 Marks
Question
What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.
✓

Answer

When a concentrated solution of sodium chloride is electrolysed, it decomposes to form sodium hydroxide, chlorine and hydrogen.
$\ 2\text{Nacl(aq)}+2\text{H}_2\text{O}(\text{l})\xrightarrow[\text{(Eletrolysis)}]{\text{Electricity}}2\text{NaCH(aq)}+\text{Cl}_2\text{g}+\text{H}_2\text{(g)}\\^\text{Sodiumcloride}\ \ \ \ \ \ \ ^\text{Water}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ^\text{Sodiumcloride}\ \ \ \ \ ^\text{Cloride}\ \ \ \ ^\text{Hydrogen}\\\ \ \ \ ^\text{(Brine)}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ^\text{(Causticsoda)}$

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