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frez [133]
2 years ago
14

A science class did an experiment in which two substances were mixed. After 15 minutes, everything looks the same, but the stude

nts noticed an odor coming from the experiment. What does this likely indicate?
a.) a liquid was formed.
b.) a temperature change occurred
c.) a chemical reaction occurred
D.) a physical change occurred
Chemistry
2 answers:
valentinak56 [21]2 years ago
5 0

Answer:

C a chemical reaction formed

Explanation:

if something changes smell and nothing else it is a chemical reaction, every other answer does not make sense

Setler [38]2 years ago
5 0

Answer:

chemical reaction

Explanation:

nothing changed with the appearance of how it looks

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Answer: Yes, HCl is a strong acid.

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Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

Yes HCl is a strong acid as it completely dissociates in water to give H^+ ions.

HCl\rightarrow H^++Cl^-

For the given chemical equation:

HCl+H_2O\rightarrow H_3O^-+Cl^-

Here, HCl is loosing a proton, thus it is considered as an acid and after losing a proton, it forms Cl^- which is a conjugate base.

And, H_2O is gaining a proton, thus it is considered as a base and after gaining a proton, it forms H_3O^+ which is a conjugate acid.

Thus acid =  HCl

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base = H_2O

conjugate acid = H_3O^+.

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