True or False
Dilute aqueous solutions of acids feel slippery.
What is False?
100
A substance that increases the concentration of hydroxide ions, OH-, in aqueous solution is called an __________
What is Arrhenius base?
100
An acid was titrated with 0.0100 M of a base. 52.0 mL of the base was required for 26.0 mL of the acid. What was the molarity of the acid?
What is 0.0200 M
M1V1=M2V2
(0.0100 M)(0.052 L)=M2(0.026 L)
M2= [(0.0100)(0.052)]/0.026
M2= 0.0200 M
100
If stomach acid (HCl)=0.16M, what is the pH of stomach acid?
What is 0.80
-log(0.16) = 0.795880......
# of sig figs in concentration is the number of places past the decimal in the pH.
Therefore the answer is rounded to 0.80 because in the 0.795, the 5 rounds the 9 up.
100
An ionic compound composed of a cation from a base and an anion from an acid is called a _________
What is salt?
200
HF(aq) + H2O(l) <-> F-(aq) + H3O+(aq)
H3O+ is a _________ in this acid-base reaction?
What is a conjugate acid?
200
The stronger a base is, the __________ its conjucate acid is.
What is weaker?
200
A chemist titrated a solution of Sodium Hydroxide and recorded that 1.65 mL of the base required 27.0 mL of 0.500 M acid. He concluded that the Sodium Hydroxide was 0.818 M. Was he right?
What is wrong?
M1V1=M2V2
(0.500 M)(0.027 L)=M2(0.00165 L)
M2=[(0.500)(0.027)] / 0.00165
M2= 8.18 M
200
Find the pH
0.00050 M Ba(OH)2
What is 11.00
pOH= -log(0.00100)
pOH= 3.00
14-3.00=pH
pH=11.00
200
What is the term for the acid-ionization constant?
What is K(a)
300
An acid that is a compound of hydrogen, oxygen, and a third element, usually a nonmetal is called an ___________.
What is oxyacid?
300
Molecular compounds containing -OH groups can be acidic or __________.
What is amphoteric?
300
Define Titration
What is the controlled addition and measurement of the amount of a solution of known concentration required to react completely with a measured amount of a solution of unknown concentration.
300
Find the pH
0.10 M H2SO4
What is 0.70
2 H+
pH= -log(0.20)
pH= 0.70
300
Why is something called a 'buffered solution'
What is because it can resist changes in the pH
400
Name the strong acids (Chemical Formulas)
What is H2SO4 HClO4, HClO3, HCl, HNO3, HBr, HI
400
What are the strong bases? (Chemical Formulas)
What is Sr(OH)2, Ba(OH)2, Ca(OH)2, any alkali earth metal bonded to an (OH-)
400
Define the equivalence point?
What is the point at which the two solutions used in a titration are present in chemically equivalent amounts.
400
How do you convert from [H]+ concentration to pOH
What is taking the -log([H]+) and then subtracting that from 14?
400
What is hydrolysis
What is a reaction between water molecules and ions of a dissolved salt.
500
Phosphoric acid is an acid that is able to donate three protons per molecule. Phosphoric acid is a __________ acid.
What is triprotic?
500
True or False
Aqueous solutions of bases taste sour
What is False?
500
A highly purified solid compound used to check the concentration of the known solution in a titration is call a _______________.
What is primary standard?
500
What is the pH of ammonia? (Give an approximation)
*Decimals are fair game*
What is pH 11.6 (9.5-12)
500
Which has a lower pH? Vinegar or Coca-Cola?
What is Vinegar. Vinegar is acetic acid and Coca-Cola is a diluted phosphoric acid so Vinegar is stronger. It is also able to turn an egg shell into Calcium Carbonate withing 2-3 weeks