1 (1 pt) What is an acid? a) an aqueous solution with a concentration of H+ ion (sometimes shown as H3O+) higher than th

[answerhappygod]

1 (1 pt) What is an acid?
a) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) higher than that
of fresh water (pH < 7)
b) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) lower than that
of fresh water (pH > 7)
c) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) same as that of
fresh water (pH = 7)
d) none of these
2 (1 pt) What is a base?
a) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) higher than that
of fresh water (pH < 7)
b) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) lower than that
of fresh water (pH > 7)
c) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) same as that of
fresh water (pH = 7)
d) none of these
3 (1 pt) What is a neutral solution?
a) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) higher than that
of fresh water (pH < 7)
b) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) lower than that
of fresh water (pH > 7)
c) an aqueous solution with a concentration of H+ ion (sometimes
shown as H3O+) same as that of
fresh water (pH = 7)
d) none of these
4 (1 pt) Why are solutions containing OH- ions alkaline
(basic)?
a) OH- ions react with H+ ions, increasing their
concentration
b) OH- ions react with H+ ions, reducing their concentration
c) both of these
d) none of these
5. 2.0M HCl has been diluted to twenty times its original
volume. (2.0M)(V1) = (M2)(20V1), solve for
M2). What is its new molarity?
a) 0.050M
b) 0.10M
c) 5.00M
d) 40.00 M
6. What is the expected pH of 0.10M HCl? (pH = - log [H+]).
a) -1.0
b) 1.0
c) 1.3
d) 12.7
7. What is the expected red cabbage indicator color when 0.10M HCl
is added to it? Making a Red
Cabbage pH Indicator The Method and the Chemistry | SciTech Connect
(elsevier.com)
a) red
b) magenta
c) green
d) yellow
8. 0.50M NaOH has been diluted to ten times its original volume.
(0.50M)(V1) = (M2)(10V1), solve for
M2). What is its new molarity?
a) 0.050M
b) 0.10M
c) 5.00M
d) 40.00 M
9. What is the expected pH of 0.050M NaOH? (pOH = - log [OH-], pH =
14 - pOH).
a) -1.0
b) 1.0
c) 1.3
d) 12.7
10. What is the expected red cabbage indicator color when 0.050M
NaOH is added to it? Making a Red
Cabbage pH Indicator The Method and the Chemistry | SciTech Connect
(elsevier.com)
a) red
b) magenta
c) green
d) yellow
11. What is pH?
a) A scale of how acidic something is (the lower the numbers, the
more acidic)
b) A scale of how acidic something is (the higher the numbers, the
more acidic)
c) A scale of how alkaline something is (the lower the numbers, the
more alkaline)
d) A scale of how alkaline something is (the higher the numbers,
the more alkaline)
12. What is pOH?
a) A scale of how acidic something is (the lower the numbers, the
more acidic)
b) A scale of how acidic something is (the higher the numbers, the
more acidic)
c) A scale of how alkaline something is (the lower the numbers, the
more alkaline)
d) A scale of how alkaline something is (the higher the numbers,
the more alkaline)
13. As concentration of an acid increases, its pH is
a) higher
b) the same
c) lower
d) none of these
14. As concentration of a base increases, its pH is
a) higher
b) the same
c) lower
d) none of these
15. When strong acids and strong bases fully react, they
neutralize each other. (The resulting mixture of
products has neutral pH.)
How many mL of 0.05M NaOH are needed to fully neutralize 5.00 mL of
0.10M HCl? According to the
balanced equation
HCl(aq) + NaOH(aq) = NaCl (aq) + H2O(l),
the number of moles of acid should equal the moles of base. (5.00
mL)(0.10M) = (V2)(0.05M), solve for
V2.
a) 5.00 mL
b) 10.00 mL
c) 15.00 mL
d) none of these
16. What is M?
a) magnesium
b) manganese
c) Molarity = moles/Liters. (Molarity multiplied by units of volume
gives moles.)
d) moles
17. Reactions of acids and bases produce heat. They are
a) endothermic
b) exothermic
c) both of these
d) none of these
18. Some of the energy of the reactants is lost as heat during
exothermic reactions. As the result,
a) chemical energy of the products is less than the chemical energy
of the reactants
b) chemical energy of the products is more than the chemical energy
of the reactants
c) both of these
d) none of these