H Chem Unit 6

When a strong acid and a strong base react, one of the products always formed is

A new acid

Water

A new base

A solid

Which of the following statements are INCORRECT

An equation is balanced by changing subscripts as needed

Chemical equations must be balanced to show that matter is conserved during a reaction

Reactants are substances written to the left of the arrow in an equation

Coefficients indicate the ratio of substances in a chemical equation

Which set of coefficients balance the equation: AlCl3 + NaOH --> AlOH3 + NaCl

1,3,1,3

3,1,3,1

1,1,1,3

3,1,1,1

A substance that, when dissolved in water, produces a solution that conducts electric current very efficiently is called

A strong electrolyte

A weak electrolyte

A nonelectrolyte

An electrical solution

Which observation(s) is/are evidence that a chemical reaction has occurred?

Color change

Gas is produced

Energy is released or absorbed

All of these

When the following equation is balanced BaSO4 + K3PO4 --> Ba3(PO4)2 + K2SO4, the coefficient in front of potassium sulfate is

When a balanced equation is written for the decomposition of ammonia (NH3) into nitrogen and hydrogen gases, what coefficient goes in front of hydrogen?

During a double replacement reaction the ions that do NOT form the precipitate

Form a second insoluble compound in the solution

Are left dissolved in the solution

Evaporate

None of the above

Identify the solid product that forms when the following are mixed: AgNO3 + BaCl2

AgBa

ClNO3

AgCl

Ba(NO3)2

In the reaction 2Cs(s) + Cl2 (g) --> 2CsCl (s) the chlorine is _____________

Synthesized

Electrolyzed

Reduced

Oxidized

In which of the following does nitrogen have an oxidation state of +4?

HNO3

NO2

N20

Nh4Cl

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H Chem Unit 6

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