Chem Review for QUAL

CHEM REVIEW​

The essential chemistry to know for QUAL, our last unit of the year!

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FYI: You will need your reference tables to complete this assignment.

Multiple Choice

When writing ionic chemical formulas, the ______ is always written first.

• Nonmetal

• Most electronegative

• Anion

• Cation

Multiple Choice

In a chemical formula, the total positive charge and negative charge must add up to equal _____.

• 0

• 1

• 2

• 3

Multiple Choice

When writing the chemical formula of a compound that contains more than one of a particular polyatomic ion, _____ must be used.

• ionic charges

• parentheses

• Greek prefixes

• lower case letters.

Multiple Choice

When naming compounds that contain a transition metal bonded to a nonmetal _____ must be used.

• parentheses

• Roman numerals

• ionic charges

• Lewis structures

• Greek prefixes

Multiple Choice

What is the correct formula for ammonium sulfate?

• NH₄SO₄

• NH₄₃SO₄

• (NH₄)₂SO₄

• NH₄(SO₄)₂

Multiple Choice

What is the formula for copper (II) bicarbonate?

• Cu₂HCO₃

• CuHCO₃₂

• CuCO₃

• Cu(HCO₃)₂

Multiple Select

Choose all that apply.

Which of the following compounds would cause the conductivity meter to light up when dissolved in water?

Hint: first identify the type of compound each formula represents!

• CO₂

• NaNO₃

• Ca₁₆Mg₂₂

• CH₄

• CoI₂

Multiple Choice

In a chemical reaction

• The atoms of the reactants always stay together to form the products
• The atoms of the reactants unbond, rearrange, and then rebond to form the products
• New atoms are formed which combine to make the products
• Some atoms disappear while others multiply to form the products

Multiple Choice

In a chemical equation, a down arrow means

• formation of a gas

• yields or produces

• formation of a precipiate

• liquid

• solid

Multiple Choice

In a chemical equation, the production of a gas is shown by

• →

• (aq)

• (l)

• $$\downarrow$$

• $$\uparrow$$

Multiple Select

Looking at the solubility table, which cation(s) are most reactive. Choose all that apply.

• Pb⁺²

• CO₃^-2

• K⁺¹

• NH₄⁺¹

• NO₃^-1

Multiple Choice

What occurs if the solutions CoI₂ and Pb(NO₃)₂ are mixed?

• two different precipitates form

• a yellow PbI₂ precipitate forms

• a blue to red precipitate forms

• NOR

Multiple Choice

In a chemical equation, the symbol (aq) indicates that the substance is

• water
• insoluble
• dissolved in water
• an acid

Multiple Choice

In order for the reaction 2Al + 6 HCl → 2AlCl₃ + 3H₂ $$\uparrow$$  to occur, which of the following must be true?

• Al must be above Cl on the activity series.
• Al must be above H on the activity series.
• Heat must be supplied for the reaction.
• A precipitate must be formed.

Multiple Choice

What occurs when you mix solutions of KCl and NaOH?

• a white NaCl precipitate forms

• HOH (water) forms

• a neutralization reaction occurs

• NOR

• a white KOH precipitate forms

Multiple Select

Which of the following compounds is insoluble in water? Choose all that apply.

• NaCl

• CuI₂

• NaHCO₃

• KOH

• all choices are insoluble

Multiple Choice

Given the two reactants, would this reaction produce a precipitate, and if so, what?

BaCl₂ + Na₂CO₃ →

• yes: NaCl

• yes: BaCO₃

• no: NOR

• yes: BaNa₂

Multiple Select

CHOOSE ALL THAT APPLY.

Properties of water include

• pH <7

• pH = 7

• pH >7

• highly conductive

• slightly conductive

Multiple Choice

What could you add to HCl to produce hydrogen gas?

• Na

• HOH

• H₂

• Si

Multiple Select

CHOOSE ALL THAT APPLY.

Which of the following chemicals, when added to phenol red, will cause the phenol red to turn yellow?

• HCl

• NaHCO₃

• HOH

• KOH

Dropdown

Solutions that will turn bright pink with phenolpthalein (PHTH) include​

Select answer

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Select answer