Question

6. Classify the following into acidic, basic and neutral substances. KOH, NaCl, CuSO4, H2CO3, HNO3, Mg(OH)2 6. Classify the following into acidic, basic and neutral substances. KOH, NaCl, CuSO4, H2CO3, HNO3, Mg(OH)2

Answer 1

Answer:

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5 and 6 both are same

Acidic - HNO3 , CuSO4 .

basic - Mg(OH)2 H2CO3

neutral substance - NaCl , KOH

Explanation:

6 both are same question .

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Answer 2

Answer:

1. KOH - strong base

2. Mg(OH)2 -  base

3. NaCl -NaCl is formed by the reaction of HCl and NaOH. Both are strong acids and bases. When a strong acid and a strong base react together the resultant is salt and water.Therefore NaCl is a salt.

NaOH+HCl -----> NaCl+H2O

4. CuSO4 -CuSO4 is an acidic salt because it is formed through the reaction of H2SO4 ( a strong acid) and Cu(OH)2 ( a weak base) . So when these acid and base react a neutralization reaction takes place. Because H2SO4 is a strong acid and has a higher influence on the salt as compared to the weak base, therefore, the salt ( CuSO4) results to be acidic in nature. The reaction can be stated as follows:

H2SO4 + Cu(OH)2 = CuSO4 + 2H2O

5. H2CO3 - acid

6. HNO3  - acid