Spontaneous or Not?

Is it Spontaneous? Aluminum metal reacts with aluminum ions.

• Spontaneous

• Non Spontaneous

Answer explanation

Same height so OA not above RA, non- spontaneous.

Is it Spontaneous? Aluminum metal reacts with sodium ions.

• Spontaneous

• Non Spontaneous

Answer explanation

OA lower than RA, uphill, nonspontaneous.

Is it Spontaneous? Lithium metal reacts with sodium ions.

• Spontaneous

• Non Spontaneous

Answer explanation

OA above RA, downhill, spontaneous.

Is it Spontaneous? Copper(II) sulphate reacts with zinc metal.

• Spontaneous

• Non Spontaneous

Answer explanation

OA above RA, downhill, spontaneous.

Is it Spontaneous? Copper(II) nitrate reacts with zinc chloride.

• Spontaneous

• Non Spontaneous

Answer explanation

Copper ions and zinc ions are both OA so they can't react with each other. The NO3- can't react without acid present, and the chlorine is too weak of an RA to react. From SOA to SRA is uphill, non-spontaneous.

Is it Spontaneous? Water reacts with chlorine gas.

• Spontaneous

• Non Spontaneous

Answer explanation

Chlorine gas is an OA, and it is higher than water as an RA. (water can also be an OA, but it is lower than chlorine gas so I don't have to worry about it.)

Is it Spontaneous? Se(s) reacts with Mg(s)

• Spontaneous

• Non Spontaneous

Answer explanation

What is going on!!! You said metals were always RA!!! Well selenium is a non-metal (sometimes referred to as a metalloid as it has some metal properties). It gains electrons to become a negative ion.

Is it Spontaneous? AgBr(s) reacts with Cu(s)

• Spontaneous

• Non Spontaneous

Answer explanation

AgBr(s) is written this way because it is insoluble, so you cannot separate it into Ag+ ions (which would react spontaneously). AgBr(s) the OA is lower than the copper RA, so it is uphill, nonspontaneous.

According the the experimental results, what is the weakest oxidizing agent?

• Au_(s)

• Au³⁺_(aq)

• Cu²⁺_(aq)

• Cu_(s)

Answer explanation

According to this series of reactions, what is the strongest reducing agent?

A + B⁺ --> no reaction

A + C⁺ --> C + A⁺

D⁺ + B --> D + B⁺

• A

• B

• C

• D

Answer explanation