what is the ratio of al³⁺ ions to s²⁻ ions in a neutral compound?\n1:1\n2:1\n2:3\n3:2

Explanation:

Step1: Determine charge - balance principle

In a neutral compound, the total positive charge equals the total negative charge.

Step2: Identify ion charges

Al³⁺ has a charge of + 3 and S²⁻ has a charge of - 2.

Step3: Find the least - common multiple

The least - common multiple of 3 and 2 is 6.

Step4: Calculate ion ratio

To get a total positive and negative charge of 6, we need 2 Al³⁺ ions (2×3 = 6) and 3 S²⁻ ions (3×2 = 6). So the ratio of Al³⁺ to S²⁻ is 2:3.

Answer:

C. 2:3