Question

Scoring: Your score will be based on the number of correct matches minus the number of incorrect matches. There is no penalty for missing matches. Use the References to access important values if needed for this question. Indicate whether each of the following compounds will gave an acidic, basic or neutral solution when dissolved in water.
ammonium perchlorate
sodium fluoride
calcium chloride
calcium nitrate
The pH will be less than 7.
The pH will be approximately equal to 7.
The pH will be greater than 7.

Answer 1

Answer:

- Ammonium perchlorate: acidic, so its pH will be less than 7.

- Sodium fluoride: basic, so its pH will be greater than 7.

- Calcium chloride: neutral, so its pH will be approximately equal to 7.

- Calcium nitrate: neutral, so its pH will be approximately equal to 7.

Explanation:

Hello,

In this case, we can foresee whether the given bases are acidic, neutral or basic by knowing both the acid and base they come from. In such a way, if a strong acid reacts with a strong base, the resulting salt is neutral, next, if a strong acid reacts with a weak base the resulting salt is acidic and if a weak acid reacts with a strong base the resulting salt is basic. Therefore, we have:

- Ammonium perchlorate: it comes from ammonium hydroxide or ammonia that are weak bases and perchloric acid which is a strong acid, therefore the salt is acidic so its pH will be less than 7.

- Sodium fluoride: is comes from sodium hydroxide which is a strong base and hydrofluoric acid which is a weak acid, therefore the salt is basic so its pH will be greater than 7.

- Calcium chloride: it comes from calcium hydroxide and hydrochloric acid which are both strong, for that reason the resulting salt will be neutral so its pH will be approximately equal to 7.

- Calcium nitrate: it comes from calcium hydroxide and nitric acid which are both strong, for that reason the resulting salt will be neutral so its pH will be approximately equal to 7.

Best regards.