Chemical Reactions Review

Balancing Chemical Reactions

100

What are the missing coefficients for the skeleton equation below?

__Al₂(SO₄)₃(aq) + __KOH(aq) --> __Al(OH)₃(aq) + __K₂SO₄(aq)

1 ,6, 2, 3

200

What are the missing coefficients for the skeleton equation below? 

__NH₃(g) + __O₂(g) ---> __N₂(g) + __H₂O(l)

4, 3, 2, 6

300

If you rewrite the following word equation as a balanced chemical equation, what will the formula and state of matter for nitrogen be? 

chlorine + potassium nitride --> potassium chloride + nitrogen

N_{2 (g)}

400

When potassium hydroxide and barium chloride react, what is the complete balanced equation?

NR

500

Write the complete balanced equation for the complete combustion of liquid C₃H₈

C₃H_{8 (l)} + 5O_{2 (g)} --> 3CO_{2 (g)} + 4H₂O _(g)

Predicting Products

100

Write and balance the reaction that will occur when solid tin (IV) reacts with oxygen gas.

Sn_(s) + O_2(g) -> SnO_2(s)

200

What is the balanced equation for the reaction that takes place between bromine and aqueous sodium iodide?

Br_2(l) + 2NaI_(aq) --> 2NaBr_(aq) + I_2(s)

300

Predict and balance the equation to represent the following reaction: Mg + HCl

Mg_(s) + 2HCl_(aq)---> MgCl_2(aq) + H_2(g)

400

Predict the products of the following reaction & write the balanced equation: Mg + AgNO_3(aq) -->

Mg_(s) + 2AgNO_3(aq) --> Mg(NO₃)_2(aq)+ 2Ag_(s)

500

Predict the product and write the complete balanced equation for when solutions of this reactant are mixed:

magnesium iodide + silver nitrate ->

MgI_2(aq)  + 2AgNO_3(aq)  -->  2AgI _(s)  + Mg(NO₃)_2(aq)

Types of Chemical Reactions

100

What is a decomposition reaction?

AB --> A + B

when one reactant breaks down to two or more simpler products

200

What type of reaction is: Br₂ + 2NaI --> 2NaBr + I₂

 Single replacement/displacement reaction

300

What is the complete balanced equation for whenliquid methane (CH₄) combusts?

CH_4(l) + 2O_2(g) --> CO_2(g) + 2H₂O_(g)

400

What determines if a double displacement reaction will occur?

If one of the products is a solid, water, or gas

500

What is the complete balanced equation for when solid barium oxide reacts with water?

BaO_(s) + H₂O_(l) -> Ba(OH)_{2 (aq)}

Predicting Precipitates

100

What will be the product that forms when cesium reacts with oxygen?

cesium oxide

200

What are the products that will form when lithium chlorate decomposes?

lithium chloride and oxygen gas

300

What is the precipitate product formed when aqueous iron (III) chloride reacts with aqueous lithium phosphate?

FePO_4 (s)

400

Which of the following solution(s), when added to a solution of Na₂SO₄ would form a precipitate? I.AgNO₃(aq)    II.KNO₃(aq)    III.CaCl₂ (aq)

I and III only

500

Which of the following solutions, when added to a solution of Fe(NO₃)₂(aq), would form a precipitate?

I.Na₂SO₄ (aq)  

II.HgCH₃COO(aq)   

III.NH₄Cl

None of them

Misc.

100

 Is NaCl soluble or insoluble? 

soluble

200

What does a complete balanced equation need to include?

correct formulas for reactants and products, states of matter, and coefficients to balance the equation

300

What products will form when calcium reacts with water?

calcium hydroxide and hydrogen gas

400

How to you know if you are predicting the formation of an acid or a base?

acid - non-metal oxide dissolved in water in a synthesis rxn

base - metal oxide dissolved in water in a synthesis rxn

500

What are similarities and differences between complete and incomplete combustion?

Similarities - same reactants, both produce water and carbon dioxide, both release energy

Differences - cc has sufficient oxygen supply/ic has limited oxygen supply, cc is safe/ic is not safe due to CO being produced, ic produces two unwanted biproducts (C and CO)