Question

When 1 mole of MgBr2 is dissolved in water, ___mole(s) of Mg2+ and _____mole(s) of Br will dissociate."

A. 1 mole(s) of Mg2+ and 2 mole(s) of Br-
B. 2 mole(s) of Mg2+ and 1 mole(s) of Br-
C. 1 mole(s) of Mg2+ and 1 mole(s) of Br-
D. 2 mole(s) of Mg2+ and 2 mole(s) of Br-

Answer 1

When 1 mole of MgBr2 is dissolved in water, it dissociates into 1 mole of Mg2+ ions and 2 moles of Br- ions.

Step-by-step explanation:

When 1 mole of MgBr2 is dissolved in water, it dissociates into 1 mole of Mg2+ ions and 2 moles of Br- ions in solution. This is because magnesium bromide is an ionic compound consisting of one magnesium ion (Mg2+) and two bromide ions (Br-).

The dissociation equation for this process is as follows: MgBr2 (aq) → Mg2+ (aq) + 2 Br- (aq). Therefore, the correct answer to the question is 'A. 1 mole(s) of Mg2+ and 2 mole(s) of Br-'.