Reactivity 3. What are the mechanisms of chemical change? Questionbank

I and II only

I and III only

II and III only

I, II and III

$\text{OH}^-$

$\text{NH}_3$

$\text{H} _2\text{O}$

$\text{H}^+$

Sodium metal is produced at the anode

Chloride ions are reduced at the positive electrode

Sodium ions are oxidised at the negative electrode

Chlorine gas is produced at the anode

One substance is protonated

Electrons are transferred

A base is neutralized

Energy is absorbed

The $\text{p}K_{\text{a}}$ of phenol red is between $6.6$ and $8.2$.

In a strongly acidic solution $[\text{HIn}] < [\text{In}^-]$.

The $\text{In}^-$ ions are yellow.

Phenol red would be a suitable indicator for the titration of a strong acid and a weak base.

$\mathrm{CH_3C(O)CH_2CH_3}$

$\mathrm{CH_3CH_2CH(OH)CH_3}$

$\mathrm{(CH_3)_3COH}$

$\mathrm{CH_3(CH_2)_2COOH}$

Phosphoric acid and methanamine

Sulfuric acid and potassium hydroxide

Ethanoic acid and potassium hydroxide

Sulfuric acid and methanamine

1-chlorobutane

1,2-dichlorobutane

2,3-dichlorobutane

2-chlorobutane

A strong base is a good proton donor and has a weak conjugate acid.

A strong acid is a good proton donor and has a strong conjugate base.

A weak acid is a poor proton acceptor and has a strong conjugate base.

A strong acid is a good proton donor and has a weak conjugate base.

A

B

C

D