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Chemical Reaction Basics
Chemical Equations & Reactions
Types of Reactions
Addition, Decomposition, & Combustion Reactions
Chemical Reactions Miscellaneous
100

Bubbling may be evidence of a chemical reaction, indicating formation of a new gas. Name three other observations that may be evidence of chemical change.

A new solid is forming. A change in temperature. A color change.

100
What in a chemical equation shows the direction of the reaction?
The arrow indicates the direction, from reactants to products.
100

What reactant must be present for every combustion reaction to occur?

Oxygen

O2

100

What kind of reaction is this, 

2H2O(l) -----> 2H2(g)+ O2(g)  

It is a decomposition reaction.

100

The symbols (s), (l), (g), and (aq) symbolize what in a chemical reaction

(g) gas, (s) solid, (l) liquid, (aq) aqueous. States of matter

200

These are broken and reformed in a chemical reaction.

What are chemical bonds.

200

What are you NOT allowed to change when balancing chemical equations?

The subscript

200

AB --> A + B is an example of what type of chemical reaction?

Decomposition

200
Hydrocarbons are composed of what atoms?
Hydrogen and carbon.
200

Predict the products of this reaction:

C12H26 + O2 --> 

CO2 + H2O

300

A chemical reaction occurs when a ______ _____________ is formed

New Substance.

300

What does it mean to say that mass is conserved in a chemical reaction?

The amount of mass in the reactants is the same as in the products

300

In this type of reaction a single element replaces a similar element in a compound

Single Replacement

300

This chart is followed to predict single replacement reactions

Activity Series

300

What does 'aq' mean?

Agueous and means that is is soluble in water at room temperature.

400

What is the name for substances that combine and change in a chemical reaction? In other words, what do you start with?

Reactants!

400

Which of the following reactions is balanced? 

4KMnO4 ---------> 2K2O + 4MnO + 4O2 

2N2O5 + NO -----> 4NO2 

Cl2 + 2Br --------> 2Cl + Br2

Cl2 + 2Br --------> 2Cl + Br2

400

In this type of reaction, a precipitate always forms.

Decomposition

400

What type of reaction is this?

C3H8 + O2 --> CO2 + H2O

Combustion

400

Predict the products of the following decomposition reaction: 

KClO3 --> 

 KCl + O2

500
Is dissolving sugar in water a chemical change or a physical change?
A physical change.
500

What are the two products in every combustion reaction?

Carbon dioxide and water

500

What two reactions are opposite/reverse of each other?

Synthesis and Decomposition

500

What is the name of the product formed when Magnesium and Oxide react with each other?

Mg + O2 --> 

Magnesium Oxide

500

Which is the more reactive metal out of K and Mg?

K