Acids and bases
What pH is considered neutral?
7
What is the chemical formula for water
H2O
What kind of bond involves the sharing of electrons?
Covalent
What are the starting materials for a reaction called?
The reactants
Why do atoms form bonds?
To fill their valance shell
Give an example of a base
NaOH
Is ice or water more dense?
Water
What kind of bond involves the complete transfer of electrons?
Ionic
What is activation energy?
The amount of energy needed to start a chemical reaction
What determines how many bonds an atom can make?
The amount of electrons the valence shell/ how many more ite needs to fill its valence shell
do acids or bases increase the amount of H+ in a system?
Acids
What does it mean when you say water is a polar molecule?
one end of it is negatively charged (the O), the other end is positively charged (the Hs)
What is the difference between a polar covalent and a nonpolar covalent bond?
Polar covalent has unequal sharing of electrons, nonpolar covalent shares the electrons equally
Is ice melting a chemical reaction?
No, it is a physical change
What does an antacid do?
Has the opposite effect of an acid/ acts like a base
What do bases increase the concentration of in a solution?
OH-
What is the vocab word for when water takes a long time to heat up or cool down?
High specific heat
What kind of bond hold the oxygen and hydrogen together in H2O?
Polar Covalent
What kind of reaction absorbs energy?
Endergonic
What does a buffer do?
Resist change in pH
Is a pH of 14 basic or acidic?
basic
What kind of bonds can happen between two different water molecules?
Hydrogen bonds
What kind of bond holds NaCl together?
Ionic
Give an example of an exergonic reaction
wood burning
What kind of bonds happen between the partially negative oxygen and partially positive hydrogens in different water molecules?
Hydrogen