Chemical Reactions, Reaction Rates, pH Scale

Which 2 of the following factors might prevent molecules from reacting?

• incorrect orientation

• insufficient energy

• molecule size

What would happen if you DECREASED the surface area of a reactant?

• the reaction would stop

• the reaction would speed up

• the reaction would slow down

• the reaction rate would not change

Increasing the concentration increases the speed of a reaction by...

• exposing more surface area of the reactants

• increasing collisions between reactants

• increasing kinetic energy of the reactants

• lowering the temperature of the reactants

Tags

NGSS.HS-PS1-5

A substance with a pH of 3 is a...

• acid

• base

A substance with a pH of 13 is a....

• acid

• base

The pH scale measures the strength of acids and bases.

• True

• False

Acids release positively charged ____________ ions in water

• hydroxide

• hydrogen

Bases release negatively charged ____________ ions in water

• hydroxide

• hydrogen

In what type of reaction does one reactant form two or more products?

• synthesis

• decomposition

• single replacement

• double replacement

In which type of reaction does two different compounds exchange positive ions (cations) to form two new compounds?

• combustion

• neutralization

• single replacement

• double replacement