Given the reaction:
HCl(g) + H2O(l) → H3O+(aq) + Cl−(aq)
Which reactant acted as a Bronsted-Lowry acid?
A) H2O(l), because it accepted protons
B) H2O(l), because it produced hydronium ions C) HCl(g), because it donated protons
D) HCl(g), because it reacted with chloride ions

The correct answer is option C.

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory:

For the given chemical equation:

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

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

Hence,the correct answer is option C.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.