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Balancing Equations
Reactants and Products
Reaction Rate
Chemical Equations
Energy and Chemical Reactions
100

___ C2H4O2 + ___ O2 --> ___ CO2 + ___ H2O

C2H4O2 + 2 O2 --> 2 CO2 + 2 H2O

100

Define a chemical reaction.

The process by which one or more substances are transformed into different chemical substances.

100

What are the 5 factors that affect the reaction rate.

Temperature, surface area, concentration, catalysts, and inhibitors.

100

Chemical equation are a form of ______________ between chemists.

Language/communication/etc...


100

The energy needed to start a chemical reaction.

Activation energy

200

___ S8 + ___ O2 --> ___ SO2 

S8 + 8 O2 --> 8 SO2

200

The substances found on the RIGHT side of the chemical equation are the _____________:


Products

200

Draw a graph that shows the effect of temperature on reaction rate.

I will judge when I see, I can't insert a photo.

200

What law must be obeyed in writing a chemical reaction?

Law of conservation of mass.
200

Reactions that require very little activation energy are called ____________ _____________.

Spontaneous reactions.
300

___ Mn(NO2)2 + ___ BeCl2 --> ___ Be(NO2)2 + ___ MnCl2

Mn(NO2)2 + BeCl2 --> Be(NO2)2 + MnCl2

300

What is broken and reformed during a chemical reaction?

Chemical Bonds

300

Why does the surface area of the reactant increase when its size decreases?

Because it has more exposed surface area. (Anything similar will be accepted.)

300

The whole number written in front of a chemical symbol is called a __________________.

Coefficient
300

Exothermic reactions generally release energy in the form of _______ or _______.

Light , heat
400

___ H2SO4 + ___ B(OH)3 --> __ B2(SO4)3 + ___ H2O

3 H2SO4 + 2 B(OH)3 --> B2(SO4)3 + 6 H2O

400

NaCl is a product of a reaction between two elements, how do the properties of the reactants and the product differ?

NaCl is an edible salt. Chlorine is a toxic gas and Sodium is a highly reactive metal.

400

Before fridges, people used to store their food in a certain substance, what is that substance? What kind of factor is at play here?

Salt, it acts as an inhibitor for bacterial activity.

400

Balanced the following: 


__NaNO3 + ___ PbO --> ___ Pb(NO3)2 + ___ Na2O

2 NaNO3 + PbO --> Pb(NO3)2 + Na2O

400
The law of conservation of energy states that energy cannot be __________ or __________ during a chemical reaction.

Created or destroyed.

500

_____ S    +  _____ HNO3   --> ____ H2SO4   +   _____ NO2   +  ____ H2O

 S    +   6 HNO3  -->   H2SO4   +  6 NO2   +   2 H2O

500

If making a cake was considered a chemical reaction with the cake being the product, what would the reactants be? (list at least 4 ingredients)

Eggs, milk, flour, sugar, baking powder, etc...

500

Draw a graph that describes an exothermic reaction. Make sure both axes are labelled!

The graph will be drawn on the board

500

Balance the following equation:

___ AgI + ___ Fe2(CO3)3 --> ___ FeI3 + ___ Ag2CO3

6 AgI + Fe2(CO3)3 --> 2 FeI3 + 3 Ag2CO3

500

Photosynthesis is an example of an endothermic reaction, where is all the energy that was absorbed from the sunlight stored?

In the bonds of the glucose molecules.