Quiz on Ch 14 and 15 answers

Report
QUIZ ON CH. 14 AND 15
1)
What does pH measure? What are the terms for a liquid with
a pH of 3, a pH of 7, and a pH 10?
pH measures [H+] concentration in a solution
3= acid 10=base
7= neutral
2) An acid produces _hydronium___ ___ions___ when
added to a solution
A base produces __hydroxide____ __ions___ when
added to a solution
3) What is a Brownstein-Lowry acid and base?
a) Acids take in H+ while bases release OHb) Acids release H+ while bases take release OHc) Acids take in OH- while bases take in H+
d) Acids release H+ while bases take in H+
4) What are the 4 types of acid-base reactions?
Strong acid + strong base
Weak acid+ strong base
Strong acid + weak base
Weak acid + weak base
5) Which of the following is a strong acid?
a) HCl
b) H2SO4
c) HC2H3O2
d) All of the above
e) Some of the above
6) H3BO3 is a….
a) Acidic anhydride
b) Monoprotic acid
c) Diprotic acid
d) Triprotic acid
7) Write the net ionic equation for the neutralization of H2SO4
with NH3. Is this solution basic, acidic, or neutral?
H2SO4 + 2NH3 (NH4)2SO4
2H+ + SO42- + 2NH3 2NH4+ + SO422H++2NH32NH4+; acidic
8) A basic anhydride is….
a) A metal oxide
b) A nonmetal oxide
c) An covalent oxide compound
d) A conjugate acid
9) Between a 0.10 M solution of H2SO4 and a 1.00 M solution of
HF, which is more concentrated and which is stronger?
a) H2SO4 is stronger and HF is more concentrated
b) H2SO4 is more concentrated and HF is more
concentrated
c) H2SO4 and HF are both strong but H2SO4 is less
concentrated
d) It is impossible to tell
10) A 25 ml solution of 0.5 M NaOH is titrated until neutralized
into a 50 ml sample of HCl. What was the concentration of the
HCl?
NaOH + HCl NaCl + H2O
V1M1=V2M2 M2=V1M1/V2 (25ml)(0.5M)/(50ml)= 0.25M= 0.3M
11) A solution has [OH-] of 1.0 x 10-9 M.
a) Find [H+]. [H+]= 1.0x10-5
b) Find the pH. pH= 14-9= 5
c) Find the pOH. pOH= -log(1.0x10-9)= 9
d) Is the solution ACID, BASE, or NEUTRAL? Acid
12) A solution has [H+] = 1.0 x 10-11 M.
a) Find [OH-]. [OH-] = 1.0x10-3
b) Find the pOH. pOH = 14-11= 3
c) Find the pH. pH= -log(1.0x10-11)= 11
d) Is the solution ACID, BASE, or NEUTRAL? Basic
13) A solution has a pOH of 8.
a) Find the pH. pH= 14-8= 6
b) Find [H+]. [H+] = 1.0 x10-6
c) Find [OH-]. [OH-] = 1.0x10-8
d) Is the solution ACID, BASE, or NEUTRAL? Acid
14) A solution has [H+] = 1.0 x 10-7 M.
a) Find [OH-]. [OH-]= 1.0 x10-7
b) Find the pOH. pOH= 14-7= 7
c) Find the pH. pH= -log(1.0x10-7)= 7
d) Is the solution ACID, BASE, or NEUTRAL? Neutral
15) What is the end point of a titration?
Point at which the [H+] = [OH-].

similar documents