Calculate the grams of the acid and base forms of Tris needed to
produce 200 mL...
Calculate the grams of the acid and base forms of Tris needed to
produce 200 mL of a 25 mM solution of buffered Tris at pH 8.0. The
pKa for Tris is 8.2 and the molecular weight of the base form is
157.6, and the acid form is 121.14.
Question 3.) Calculate the grams of phosphorus
in the 100 ml sample
The acid-base titration procedure depends on the ability of a
certain stoichiometric amount of sodium hydroxide being capable of
transforming the precipitate as follows:
X OH-
+ (NH4
)3[P(Mo12O40)]×12H2O
-> 3 NH4+ + HP042- +
12 MoO42-
+ Y H2O
Balance this equation to find numerical values for X and Y.
50.00 mL of 0.1000 M sodium hydroxide is added to the sample,
enough to have enough NaOH to...
For each of the following acid-base reactions, calculate the
mass (in grams) of each acid necessary to completely react with and
neutralize 5.75 g of the base. HCl(aq)+NaOH(aq)→H2O(l)+NaCl(aq)
How many grams of Tris base (Trizma base) and sodium chloride
are weighed out to make one liter of 10x Tris-buffered saline, pH
7.4 (TBS) which contains 100mM Tris base and 1.5 M NaCl?
For each of the following acid-base reactions, calculate how
many grams of each acid are necessary to completely react with and
neutralize 2.8 g of the base.
Part A :
HCl(aq)+NaOH(aq)→H2O(l)+NaCl(aq)
Part B :
2HNO3(aq)+Ca(OH)2(aq)→2H2O(l)+Ca(NO3)2(aq)
Part C :
H2SO4(aq)+2KOH(aq)→2H2O(l)+K2SO4(aq)
Express your answer using two significant
figures.
For each of the following acid-base reactions, calculate how
many grams of each acid are necessary to completely react with and
neutralize 2.7 g of the base.
A.
HCl(aq)+NaOH(aq)→H2O(l)+NaCl(aq)
B.
2HNO3(aq)+Ca(OH)2(aq)→2H2O(l)+Ca(NO3)2(aq)
C.
H2SO4(aq)+2KOH(aq)→2H2O(l)+K2SO4(aq)
How much oxalic acid dihydrate, in grams, is needed to prepare
650 mL of a 0.844 M solution? Oxalic acid dihydrate is (COOH)2•2
H2O.
Your Answer:
Question 5 options:
Answer
units
What volume of 0.169 M KMnO4 solution is needed to prepare 476.
mL of 0.0177 M KMnO4? Enter your answer in units of mL.
Your Answer:
Question 6 options:
Answer
units
You titrated a 21.00 mL solution of 0.0500 M oxalic acid with a
freshly prepared solution of KMnO4....
How many mL of 0.200 M HBr acid would be needed to neutralize
50.0 grams of calcium hydroxide solid that is completely dissolved
in enough water to make 500. mL of solution?
Calculate the pH for 200. mL of a 0.750 M solution of the weak
base, ethanolamine (HOCH2CH3NH2), Kb=3.20x10-5 ) being titrated
with 0.750 M HCl at the following positions in the titration.
a) The initial pH (before any HCl has been added). a. 2.300 b.
3.542 c. 8.945 d. 11.690 e. 13.976
b) The pH of the solution after 75.0 mL of 0.750 M HCl has been
added. a. 0.769 b. 9.727 c. 3.564 d. 8.654 e. 13.230
c)The pH...
A 25.0 mL of a weak acid is titrated with a strong base (0.1 M).
Calculate the pH of the solution during the titration if the weak
acid concentration is 0.10 M and its Ka = 1.8 x 10-5 and 10.0 mL of
base has been added. (Hint: use Henderson-Hasselbach equation).
a) pH = 4.56
b) pH= 5.28
c) pH= 4.74