Simple Chemical Reactions
Neutralization
Detecting Chemical Reactions
Identifying Variables
Wild Card
100
What do we call a reaction when a substance reacts with oxygen?
Burning / combustion / oxidation
100
What are the reactants in a neutralization reaction?
Acid and alkali
100
Which of the following is not an indicator that a chemical reaction has taken place?
a. Color change
b. Odour given off
c. Change of state
d. Bubbles or fizzing
c. Change of state
100
Identify each description as either independent, dependent or control.
A: Variables that are kept the same
B: Variable that we change
C: Variable that we measure
A: CV
B: IV
C: DV
100
K is the chemical symbol for which element?
Potassium (from Latin word "Kalium")
200
A popsicle melting is an example of a:
a. Chemical change
b. Physical change
b. Physical change
Phase changes are always physical changes
200
What are the two products that form in a neutralization reaction
A salt and water
200
What are the reactants in this chemical reaction?
Methane and oxygen
CH4 and O2
200
An investigation is conducted to investigate the relationship between the amount of food a person eats and the amount of weight they gain. What is the independent and dependent variable in this experiment?
IV: amount of food eaten
DV: weight gain
200
Name one type of chemical reactions that forms a salt?
Neutralization
Metal + acid
300
Which of the following reactions results in the formation of an oxide?
a. Adding a metal to an acid
b. Burning a metal
c. Adding a metal to water
b. Burning a metal
Metal + Oxygen --> Metal oxide
300
What is the name of this apparatus that is used to perform a titration (neutralization reaction)?
Burette
300
What do we call an insoluble solid that forms when two liquids react?
Precipitate
300
True or false:
In order to have a fair test there can not be more than one independent variables.
True
300
Which of the following shows the particle diagram form a mixture of elements and compounds.
W
400
In a chemical reaction, the starting substance are called ___________ and the ending substances are called ____________.
Reactants and products
400
What are the products when hydrochloric acid and sodium hydroxide react?
Sodium chloride (a salt) and water
400
How can we test for oxygen?
Put a glowing split in the test tube and if oxygen is present the splint will reignite.
400
An investigation is conducted to find the change in the speed a ball strikes the ground with as it is dropped from different heights. What is a possible hypothesis for this experiment.
If the ball is dropped from a greater height, then it will strike the ground with a greater speed.
400
In a neutralization reaction 20cm3 of an alkali was needed to neutralize 15cm3 of an acid. Which was stronger, the alkali or the acid?
The acid
500
Name the salt that forms when magnesium reacts with sulfuric acid.
Magnesium sulfate
500
What are three real-world applications of neutralization reactions?
Toothpaste neutralizes acid in mouth
Lime added to soil
Alkali added to acidic lake
Acid added to wasp sting
Alkali added to bee sting
Indigestion powder to neutralize stomach acid
500
What gas is produced during respiration? How can we test for this gas?
Carbon dioxide
Bubble the gas in limewater and it will become cloudy
500
An experiment is conducted to investigate what liquid is the best for plant growth. What are three possible control variables to ensure this is a fair test.
Type of plant
Type of soil
Amount of liquid
Amount of light
500
Which particle in an atom carries a negative charge?
The electron
