Question 1

Which of the following best describes an ionic hydrate?

Accepted Answer

An ionic compound that includes at least one molecule of $$\mathrm{H_2O} in $$its structure.

Question 2

What is the correct name for the compound $$\mathrm{CuCl \cdot 2H_2O}$$?

Accepted Answer

Copper(I) chloride dihydrate

Question 3

Given the formula $$\mathrm{K_2Cr_2O_7 \cdot 3H_2O}$$, what is the correct systematic name?

Accepted Answer

Potassium dichromate trihydrate

Question 4

What is the correct chemical formula for calcium selenide hexahydrate?

Accepted Answer

$$\mathrm{CaSe \cdot 6H_2O}$$

Question 5

Which numerical prefix is used to indicate seven water molecules in a hydrate?

Accepted Answer

Hepta

Question 6

What is the name of the hydrate $$\mathrm{$$BaCl_2$$ \cdot 2H_2O}$$?

Accepted Answer

Barium chloride dihydrate

Question 7

A patient is prescribed a medication containing $$\mathrm{$$FeSO_4$$ \cdot 7H_2O}. $$What is the correct name for this compound?

Accepted Answer

Iron(II) sulfate heptahydrate

Question 8

Which step is unique to naming ionic hydrates compared to naming regular ionic compounds?

Accepted Answer

Adding the hydrate portion with the appropriate numerical prefix for water molecules.

Question 9

If a compound is named sodium carbonate decahydrate, what is its chemical formula?

Accepted Answer

$$\mathrm{Na_2CO_3 \cdot 10H_2O}$$

Question 10

Which of the following is the correct name for $$\mathrm{$$MgSO_4$$ \cdot 7H_2O}$$, a compound commonly used in medicine?

Accepted Answer

Magnesium sulfate heptahydrate

Question 11

A sample of $$\mathrm{$$CoCl_2$$ \cdot 6H_2O} is $$heated until all water is removed. What is the resulting compound?

Accepted Answer

$$\mathrm{$$CoCl_2$$}$$

Question 12

Which of the following formulas represents a compound with eight water molecules?

Accepted Answer

$$\mathrm{Na_2SO_4 \cdot 8H_2O}$$

Question 13

Which prefix would you use for a hydrate containing five water molecules?

Accepted Answer

Penta

Question 14

A chemist discovers a new hydrate: $$\mathrm{Al_2$(SO_4$)_3 \cdot 18H_2O}. $$What is the correct name for this compound?

Accepted Answer

Aluminum sulfate octadecahydrate

Question 15

Which of the following is the correct formula for potassium nitrate tetrahydrate?

Accepted Answer

$$\mathrm{$$KNO_3$$ \cdot 4H_2O}$$

Question 16

Which compound is named zinc sulfate hexahydrate?

Accepted Answer

$$\mathrm{$$ZnSO_4$$ \cdot 6H_2O}$$

Question 17

A hydrate is named copper(II) sulfate pentahydrate. What is its formula?

Accepted Answer

$$\mathrm{$$CuSO_4$$ \cdot 5H_2O}$$

Question 18

Which of the following is NOT a correct step in naming ionic hydrates?

Accepted Answer

Ignore the number of water molecules when naming the compound.

Question 19

A student writes the name 'potassium sulfate trihydrate' for $$\mathrm{K_2SO_4 \cdot 3H_2O}. $$Which part of the name indicates the number of water molecules?

Accepted Answer

Trihydrate

Question 20

Which of the following is the correct name for $$\mathrm{Pb(NO_3$)_2 \cdot 2H_2O}$$?

Accepted Answer

Lead(II) nitrate dihydrate

Ionic Hydrates: Naming and Formulas

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