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chemical reactions
types of reactions
vocabulary
rates of reactions
labs
100
In a chemical reaction a. atoms are created b. atoms are destroyed c. atoms are rearranged
C
100
reactions that absorb energy
What are endothermic reactions?
100
A participant in a chemical reaction. (things to the left of the arrow)
What is reactant
100
True or False Increasing the surface area of reactants increases the reaction rate
What is true
100
When you added your seltzer tablet to water what indication did you have that a chemical change was taking place?
bubbling and fizzing
200
In a chemical reaction, this is what the arrow points to (to the right of the arrow)
What are products
200

HCl + Metal -----> H2 + Metal Chloride

What is Hydrochloric acid with a metal reaction?

200
What is formed in a chemical reaction (things the arrow points to)
What is product
200
True or False Decreasing the concentration of the particles will increase the reaction rate.
What is false?
200
Breaking the seltzer tablet produced a faster reaction. What factor that affects reaction rates did this demonstrate?
What is increasing surface area?
300
reactions that release energy
What is exothermic
300

Metal + Oxygen -----> H2 + Metal Chloride; create a metal-oxide surface and produce heat and light.

What is oxidation of a metal?

300

a substance that neutralizes a base to form water, has a pH less than 7.

What is Acid?

300
True or false. Increasing the pressure of a gas can increase the reaction rate.
True
300
The temperature decreased when vinegar and baking soda were mixed. Is this exothermic or endothermic?
What is endothermic?
400
Reactions where the energy of the products is less than the energy of the reactants
What is exothermic
400

Acid + Base -----> Water + Salt (Ionic compound); There is a change of pH to a more neutral pH with the formation of water. 

What is Neutralizing an acid with a base?

400
a substance that can speed up a chemical reaction without being consumed or changed.
What is catalyst
400
factor that increases a reaction rate by increasing the speed of the particles.
What is increasing temperature?
400
The temperature of water that gave the slowest reaction rate when a seltzer tablet was added.
What is cold?
500

Production of gas, production of light, production of heat, Precipitate, Color change

What is evidence of a chemical reaction?

500

Heat and light are produced along with carbon dioxide gas. 

What is combustion?

500

A substance that neutralizes an acid to form water, has a pH above 7.

What is base?

500
factor that increases reaction rates by decreasing the activation energy
What is a catalyst?
500
Mixing yeast and peroxide released energy. What type of reaction was this?
exothermic