Amines (A-level only)

A student prepares aqueous solutions of ethylamine, ammonia, and phenylamine, each with a concentration of 0.10 mol dm^-3.

Which of the following represents the correct order of decreasing pH of these solutions?

$phenylamine>ammonia>ethylamine\text{phenylamine} > \text{ammonia} > \text{ethylamine}$

$ethylamine>ammonia>phenylamine\text{ethylamine} > \text{ammonia} > \text{phenylamine}$

$ammonia>ethylamine>phenylamine\text{ammonia} > \text{ethylamine} > \text{phenylamine}$

$ethylamine>phenylamine>ammonia\text{ethylamine} > \text{phenylamine} > \text{ammonia}$

Amines (A-level only) Questions

A student prepares aqueous solutions of ethylamine, ammonia, and phenylamine, each with a concentration of 0.10 mol dm^-3.

Which of the following represents the correct order of decreasing pH of these solutions?

$phenylamine>ammonia>ethylamine\text{phenylamine} > \text{ammonia} > \text{ethylamine}$

$ethylamine>ammonia>phenylamine\text{ethylamine} > \text{ammonia} > \text{phenylamine}$

$ammonia>ethylamine>phenylamine\text{ammonia} > \text{ethylamine} > \text{phenylamine}$

$ethylamine>phenylamine>ammonia\text{ethylamine} > \text{phenylamine} > \text{ammonia}$