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empirical, molecular, hydrrates

Authored by Cindy Faulk

Chemistry

11th - 12th Grade

NGSS covered

Used 1+ times

empirical, molecular, hydrrates
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11 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Name the following ionic compound: MgSO4*7H2O

magnesium sulfate * hexahydarte
magnesium sulfate hexahydarte
magnesium sulfate heptahydrate
magnesium sulfate* heptahydrate

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Name the following hydrate:  NaCl * 5H2O

sodium chloride 
sodium monochloride pentahydrate
sodium chloride pentahydrate
pentahydrate

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the correct chemical formula for barium hydroxide octahydrate?

Ba(OH)2 . 8H2O

Ba(OH)2 . H2O

8Ba(OH)2 . H2O

Ba . 8(OH)2

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the best method for removing water from a hydrated compound?

freezing

filtration

distillation

heating

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A 15.67 g sample of a hydrate of magnesium carbonate was heated to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate?

MgCO3 · 5H2O
MgCO3 · 4H2O
MgCO3 · 6H2O
MgCO3 · 1H2O

Tags

NGSS.HS-PS1-7

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A hydrate of magnesium chloride is present and the following data is collected:

mass of evaporating dish = 22.130 grams

mass of dish + hydrate = 25.290 grams

mass of dish and contents after heating = 23.491 grams

What is the mass of the anhydrous MgCl2?

1.799 g

3.160 g

1.361 g

23.491 g

Tags

NGSS.HS-PS1-7

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the empirical formula for the following:
32.40% sodium, 22.5% sulfur; 45.1 % oxygen, 37.75% water?

Na2SO4H6O3
Na2SO4 . 2H2O
Na2SO4 . 3H2O
Na2SO4 . (H2O)3

Tags

NGSS.HS-PS1-7

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