Using the Brønsted-Lowry concept of acids and bases, identify the Brønsted-Lowry acid and base in each of the following reactions: HS−(aq)+H2O(l)→H2S(aq)+OH−(aq) (CH3)3N(g)+BCl3(g)→(CH3)3NBCl3(s)

Explanation:

A Brønsted-Lowry acid is any species capable of donating a proton (H +).

A Brönsted-Lowry base is a substance capable of winning or accepting a proton (H +).

Then there is a transfer of protons that requires the presence of a proton donor, that is, an acid and a base that accepts them. Thus, the acid-base reaction is one in which the acid transfers a proton to a base.

In the first case you have:

HS⁻ + H₂O → H₂S + OH⁻

You can see that the HS⁻ has become H₂S. This indicates that it has accepted a proton (H⁺), so, according to the definitions seen, it is a Brønsted-Lowry base.  

H₂O has become OH⁻. As it has an H + less proton, it is possible to say that it has donated said proton, so it is a Brønsted-Lowry acid.

When an acid donates a proton, this acid is called a conjugate base. On the contrary, when a base receives a proton it is known as conjugate acid. This is called conjugate acid-base pairs. And this is what occurs in this case.

In the other case you have:

(CH₃)₃N(g)+BCl₃(g)→(CH₃)₃NBCl₃(s)

In this case there is no transfer of a proton from an acid to a base. So this reaction cannot be explained by the Brønsted-Lowry theory.

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.

the answer is 0.8m.

by: nicholas