Question

What is the ratio of Sr2+ ions to Br- ions in a neutral compound

Answer 1

Neutral => positive charge = negative charge

Sr 2+ --> 2 positive charge

Br - --> 1 negative charge => you need two Br

2 Br - --> 2 negative charge

Then, the ratio is 1 Sr2+ ion to 2 Br - ions = 1Sr2+ / 2Br- = 1/2

Answer 2

Answer: The ratio of
`Sr^(2+)` to
`Br^(-1)` is 1:2.

Explanation: A neutral compound is one which does not bear any charge. Thus to make a compound neutral, the amount of positive charge must be equal to the amount of negative charge.

Thus to balance
`Sr^(2+)`, two molecules of
`Br^(-1)` are required. They combine to form strontium bromide (
`SrBr_2`).