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During chemistry lab, Carl and his lab partner, Mary, mixed four halide salts, one at a time, with silver nitrate. Mary commented that
all but one salt reacted chemically with the silver nitrate. Carl asked her how she knew that a chemical reaction had occurred. What
was Mary's response based on evidence in this activity?
al reaction the corecmented that
A)
A gas formed.
A precipitate formed.
The silver nitrate disappeared.
An exothermic reaction took place

Respuesta :

anfabba15

Answer:

A precipitate formed. The one that does not react is the salt from fluoride because it is soluble

Explanation:

The halide salts are made of:

Cl⁻  → Chloride

F⁻  →Fluoride

Br⁻  → Bromide

I⁻ → Iodide

The solution contains AgNO₃

When the AgNO₃ dissociates in aqueous solution, it produces silver cation and nitrate anion

AgNO₃ (aq) → Agâș (aq) + NO₃⁻(aq)

Agâș  can react to the halides and the all make precipitate except for the F⁻

Agâș(aq) + Cl⁻(aq)  → AgCl (s) ↓

Agâș(aq) + F⁻(aq)  →AgF (aq)

Agâș(aq) + Br⁻(aq)  → AgBr (s) ↓

Agâș(aq) + I⁻ (aq) → AgI (s) ↓

hazel360

Answer:

A precipitate formed

Explanation:

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