QUESTION 2 The following reaction took place in Henderson Hall: AgNO 3 + NaCl --

Question

QUESTION 2

The following reaction took place in Henderson Hall:

AgNO3 + NaCl --> AgCl + NaNO3

A white precipitate will not form from this reaction.

True

False

2 points   

QUESTION 3

You are given three numbers: 57.300, 57.297, 57.298.  What is the average of these three numbers if you round up to four significant figures?

57.29

57.298

57.30

57.3

2 points   

QUESTION 4

Heating above 100oC is absolutely necessary to drive water off of a hydrate.

True

False

2 points   

QUESTION 5

A hydrate is a metal salt that has water coordinated to it.

True

False

2 points   

QUESTION 6

An anhydrous salt is a metal salt that has water coordinated to it.

True

False

57.29

57.298

57.30

57.3

Explanation / Answer

2) False.

Since the product AgCl produced in the given reaction is a white colour solid precipitate. Hence given statement is FALSE.

3) we know that,

Average = sum of total numbers/ total number of numbers

=(57.300+57.297+57.298)/3

= 57.298 = 57.30( 4 significant figures )

4). False.

Since it is not necessary to heat the hydrated salt over boiling point of water. Also water can eliminate or evaporated below to its temperature. So it's not always 100°c is required

5) True.

Since a hydrated salt is a salt in which the water molecules are bonded to metal ions.

6) False.

Since anhydrous salt will obtained by removing all water molecules from hydrated salt.

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