Chemical Reactions

Types of Reactions

100

A synthesis reaction.

What is 2 or more substances combine to make a more complex substance.

200

This type of reaction happens when a more complex substance breaks down into simpler substances.

Decomposition Reaction

300

2 Al (s)  +  6 HBr   →   2 AlBr₃  +  3 H₂

What is a single replacement reaction?

400

Carbon dioxide and water

What are the two products of a complete combustion reaction?

500

The two products of this double replacement reaction:

PbCl2  +  KI     →    ?   +   ?

What are PbI2 and KCl

Speeding Up or Slowing Down a Reaction

100

Two particles must do this in order to react.

What is collide.

200

Two particles must posses BOTH of these correct factors in order for a reaction to be successful.

What is enough energy and correct orientation.

300

This chemical, when added to a reaction, will speed up a reaction by lowering the activation energy of the reaction.

What is a catalyst?

400

List 3 ways to speed up a reaction.

What are stirring, heating, adding more reactants, adding a catalyst, and grinding up the reactants.

500

List three ways to SLOW DOWN a chemical reaction.

What are keep it cold, don't stir, keep it in a large chunk, dilute it and add an inhibitor.

Balancing

100

Balance:

HCl + __Na₂S → __H₂S + __NaCl

What is

HCl + __Na₂S → __H₂S + _2  NaCl

200

Balance:

__AlF₃ → __Al + __F₂

_2_AlF₃ → _2_Al + _3_F₂

300

Balance:

CH₄ +   O₂ → CO₂ + H₂O

Wha is

CH₄ + 2 O₂ → CO₂ + 2 H₂O

400

In a chemical reaction, mass cannot be created or destroyed.

What is the law of conservation of mass?

500

Balance:

MgSO₄  +  AlF₃    →    MgF₂  +  Al₂(SO₄)₃

What is

3 MgSO₄  + 2 AlF₃    →  3 MgF₂  +  Al₂(SO₄)₃

Lab

100

Safety precautions that should be taken during a chemical reaction?

What are goggles and closed-toed shoes.

200

A solid that forms when two solutions are mixed.

What is a precipitate?

300

This word means that a solid will dissolve in water.

What is soluble?

400

These positive ions will guarantee that a chemical dissolves in water.

What are group I cations?

500

The name of this chemical: Pb(NO3)2

What is lead(II) nitrate?

Energy Changes

100

Heat energy is absorbed by a reaction.

What is Endothermic?

200

The way a beaker feels if it contains an endothermic reaction.

What is cold?

300

The amount of energy required to get a chemical reaction started.

What is activation energy?

400

Give a real-life exothermic reaction.

What is fire, combustion, etc.

500

The final potential energy of a reaction is LESS THAN the initial potential energy.

What is an exothermic reaction?