Chemistry Definitions Intermediate Quiz 2
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Intermediate Quiz 2
1. What is a pH indicator?
A chemical that changes color depending on acidity or basicity
A type of acid
A kind of salt
2. What is a buffer?
Solution that resists changes in pH when acids or bases are added
Solution that changes pH easily
A type of catalyst
3. What is a redox reaction?
A reaction involving transfer of electrons between substances
A reaction involving only acids and bases
A reaction forming a precipitate
4. What is oxidation?
Loss of electrons during a reaction
Gain of electrons
Formation of a solid
5. What is reduction?
Gain of electrons during a reaction
Loss of electrons
Formation of a gas
6. What is a hydrocarbon?
A compound made of only hydrogen and carbon atoms
A compound containing oxygen
A compound containing nitrogen
7. What is molarity?
The concentration of a solution expressed as moles of solute per liter of solution
The mass of a solution
The number of atoms in a molecule
8. What is Avogadro’s number?
6.02 × 10²³, the number of particles in one mole of a substance
The atomic number of oxygen
The number of protons in a nucleus
9. What is a limiting reactant?
The reactant that is completely used up first in a chemical reaction
The reactant that is left over
The product of a reaction
10. What is stoichiometry?
The calculation of reactants and products in chemical reactions
The study of acids and bases
The study of atomic structure
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