Determine the correct order of the steps to processing aluminum from bauxite. I. Al3+ ions undergo reduction, O2- ions undergo oxidation. II. Al3+ ions are attracted to the negative electrode on the bottom, O2- ions are attracted to the positive electrode on the top. III. Electric current is added IV. Oxygen and carbon from graphite form carbon dioxide, pure aluminum on the bottom is collected. V. Bauxite is added to molten cryolite in a tank with graphite electrodes. A. I, II, III, V, IV B. V, III, II, I, IV C. IV, V, III, I, II D. I, III, II, IV, V

Option B. V, III, II, I, IV

Explanation:

The steps involved in the processing of aluminum from bauxite include:

1. Bauxite is added to molten cryolite in a tank with graphite electrodes.

2. Electric current is added to maintain the process at about 1000°C. This makes the process more expensive to maintain.

3. Al3+ ions are attracted to the negative electrode and O2- ions are attracted to the positive electrode.

4. Al3+ ions undergo reduction, O2- ions undergo oxidation as shown below :

2Al3+ + 6e- —> 2Al (reduction)

O^2- —> O + 2e-

O + O —> O2 (oxidation)

5. Oxygen and carbon from graphite form carbon dioxide, pure aluminum on the bottom is collected at intervals.

Comparing this with the above question, the correct order is:

V, III, II, I, IV

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance