Question

Some help would be greatly appreciated :)
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Answer 1

Thet is because solution Y is equal to X's.
Account that the reaction between an acid and base gives salt and water.
Solution X is the same as Amoonium chloride in water, which is NH4Cl.
Y will be NH3 + HCl - NH4Cl in water as well or aqueous.
Conclusively, they ar both the same resulting production, thus having the same pH.

Answer 2

Thanks.

Answer 3

thanks ^_^

Answer 4

No problem.