Question

В предложенных рядах веществ найдите лишнее вещество. 1. KOH, H2SO4, Ca(OH)2, Mg(OH)2.2. H2SO4, HCl, KOH, H3PO4.3. Na2SO4, NaOH, Ca(NO3)2, ZnCl2.​

Answer 1

Ответ:

1)H2SO4, все основания, а это кислота

2)КОН все кислоты, а это основание

3)NaOH все соли, а это основание

Answer 2

Finding the Odd Substance in the Given Series

To find the odd substance in each series, let's examine each series individually:

1. KOH, H2SO4, Ca(OH)2, Mg(OH)2: - KOH is a strong base. - H2SO4 is a strong acid. - Ca(OH)2 is a strong base. - Mg(OH)2 is a weak base.

The odd substance in this series is H2SO4 because it is the only strong acid, while the others are bases [[1]].

2. H2SO4, HCl, KOH, H3PO4: - H2SO4 is a strong acid. - HCl is a strong acid. - KOH is a strong base. - H3PO4 is a weak acid.

The odd substance in this series is H3PO4 because it is the only weak acid, while the others are strong acids or bases [[2]].

3. Na2SO4, NaOH, Ca(NO3)2, ZnCl2: - Na2SO4 is a salt. - NaOH is a strong base. - Ca(NO3)2 is a salt. - ZnCl2 is a salt.

In this series, all substances are salts, so there is no odd substance.

Therefore, the odd substances in the given series are: 1. H2SO4 in the first series. 2. H3PO4 in the second series.

I hope this helps! Let me know if you have any further questions.