Respuesta :

Edufirst
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: The ratio of [tex]Sr^{2+}[/tex] to [tex]Br^{-1}[/tex] 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 [tex]Sr^{2+}[/tex], two molecules of [tex]Br^{-1}[/tex]  are required. They combine to form strontium bromide ([tex]SrBr_2[/tex]).

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