How could a student determine whether an unknown chemical is an acid? (2 points)
test the hydrogen ion concentration in the sample.
measure the boiling point of the sample.
weigh the sample before and after adding salt.
determine whether the sample has surface tension.

Option (a) is the correct answer.

Explanation:

Acids are the species that contains number of hydrogen ions.

Foe example, HCl is an acid.

Whereas bases are the species that contain hydroxide ions.

For example, NaOH is a base.

Therefore, in order to check whether an unknown chemical is an acid we can test the hydrogen ion concentration in the sample.

As this can lead to detection of the sample.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.