How many moles of aqueous magnesium ions and chloride ions are formed when 0.240 mol of magnesium chloride dissolves in water

1. 0.240 mole of magnesium ion, Mg^2+

2. 0.48 mole of chloride ion, Cl^-

Explanation:

We'll begin by writing the balanced dissociation equation for magnesium chloride. This is given below:

MgCl2(aq) —> Mg^2+(aq) +2Cl^-(aq)

1. Determination of the number of mole of magnesium ion, Mg^2+ obtained from the dissolution 0.240 mol of magnesium chloride, MgCl2 in water. This is illustrated below:

From the balanced equation above,

1 mole of MgCl2 produced 1 mole of Mg^2+.

Therefore, 0.240 mole of MgCl2 will also produce 0.240 mole of Mg^2+.

Therefore, 0.240 mole of magnesium ion, Mg^2+ is produced.

2. Determination of the number of mole of chloride ion, Cl^- obtained from the dissolution 0.240 mol of magnesium chloride, MgCl2 in water. This is illustrated below:

From the balanced equation above,

1 mole of MgCl2 produced 2 moles of Cl^-.

Therefore, 0.240 mole of MgCl2 will produce = (0.240 x 2) = 0.48 mole of Cl^-.

Therefore, 0.48 mole of chloride ion, Cl^- is produced.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.