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In: Chemistry
A chemistry graduate student is given 100.mL of a 1.50M diethylamine C2H52NH solution. Diethylamine is a...
A chemistry graduate student is given 100.mL of a 1.50M diethylamine C2H52NH solution. Diethylamine is a weak base with =Kb×1.310−3. What mass of C2H52NH2Cl should the student dissolve in the C2H52NH solution to turn it into a buffer with pH =11.35? You may assume that the volume of the solution doesn't change when the C2H52NH2Cl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
Solutions
queen_honey_blossom answered 9 months agoRelated Solutions
A chemistry graduate student is given 100. mL of a 1.50 M hydrocyanic acid (HCN) solution....
A
chemistry graduate student is given 100. mL of a 1.50 M hydrocyanic
acid (HCN) solution. Hydrocyanic acid is a weak acid with Ka=
4.9*10^-10. What mass of KCN should the student dissolve in the HCN
solution to turn it into a buffer with pH= 9.53
A chemistry graduate student is given 300.mL of a 1.10M benzoic acid HC6H5CO2 solution. Benzoic acid...
A chemistry graduate student is given 300.mL of a 1.10M benzoic
acid HC6H5CO2 solution. Benzoic acid is a weak acid with
Ka=6.3x10^−5.
What mass of KC6H5CO2 should the student dissolve in the
HC6H5CO2 solution to turn it into a buffer with pH =4.40?
You may assume that the volume of the solution doesn't change
when the KC6H5CO2 is dissolved in it.
Be sure your answer has a unit symbol, and round it to 2
significant digits
A chemistry graduate student is given 250.mL of a 0.10M chlorous acid HClO2 solution. Chlorous acid...
A chemistry graduate student is given 250.mL of a 0.10M chlorous
acid HClO2 solution. Chlorous acid is a weak acid with
Ka=1.1x10^−2.
What mass of NaClO2 should the student dissolve in the HClO2
solution to turn it into a buffer with pH =2.40?
You may assume that the volume of the solution doesn't change
when the NaClO2 is dissolved in it.
Be sue your answer has a unit symbol, and round it to 2
significant digits.
A 7% DEXTROUS SOLUTION (7 MG PER 100 ML OF SOLUTION) IS GIVEN INTRAVENOUSLY SUPPOSE A...
A 7% DEXTROUS SOLUTION (7 MG PER 100 ML OF SOLUTION) IS GIVEN
INTRAVENOUSLY SUPPOSE A TOTAL OF 1.61L OF THE SOLUTION IS GIVEN
OVER A 14 HOUR PERIOD.
A) WHAT IS FLOW RATE IN UNITS OF ML/HR?
B) WHAT IS FLOW RATE IN DEXTROUS PER HOUR?
C) IF EACH ML CONTAINS 16 DROPS WHAT IS THE FLOW RATE IN UNITS
OF GTT/HR?
D) DURING THE 14 HOUR PERIOD HOW MUCH DEXTROUS IS DELIVERED?
A student is given 3 beakers: Beaker 1- 50.0 ml of a solution produced by dissolving...
A student is given 3 beakers:
Beaker 1- 50.0 ml of a solution produced by dissolving
6.00 grams of a weak
monoprotic acid ,HX, in enough water to produce 1 liter of
solution.
The empirical formula of HX is CH
O. The solution contains 3 drops
of phenolphthalein.
Beaker 2- A 0.07M solution of the salt NaX. It has a
pH of 8.8
Beaker 3 - 50.0 ml of 0.250M KOH
The contents of beaker 3 is added drop-wise to...
A student is given 3 beakers: Beaker 1- 50.0 ml of a solution produced by dissolving...
A student is given 3 beakers:
Beaker 1- 50.0 ml of a solution produced by dissolving 6.00
grams of a weak monoprotic acid ,HX, in enough water to produce 1
liter of solution. The empirical formula of HX is CH2O.
The solution contains 3 drops of phenolphthalein.
Beaker 2- A 0.07M solution of the salt NaX. It has a pH of
8.8
Beaker 3 – 50.0 ml of 0.250M KOH
The contents of beaker 3 is added drop-wise to beaker...
A) Kb=6.9×10-4 for diethylamine A 26.8 mL sample of 0.330 M diethylamine, (C2H5)2NH, is titrated with...
A)
Kb=6.9×10-4 for diethylamine
A 26.8 mL sample of 0.330 M
diethylamine,
(C2H5)2NH, is
titrated with 0.333 M hydrobromic
acid.
The pH before the addition of any hydrobromic acid
is ___ .
B)
Kb=6.3×10-5 for trimethylamine
A 22.2 mL sample of 0.275 M
trimethylamine,
(CH3)3N, is titrated with
0.293 M nitric acid.
At the equivalence point, the pH is ___.
C)
Kb=5.9×10-4 for dimethylamine
A 25.9 mL sample of 0.239 M
dimethylamine,
(CH3)2NH, is titrated with
0.213 M hydroiodic acid....
In September 2000, each student in a random sample of 100 chemistry majors at a large...
In September 2000, each student in a random sample of 100
chemistry majors at a large university was asked in how many lab
classes he or she was enrolled. The results indicated a mean of
1.65 lab classes and a standard deviation of 1.39. To determine
whether the distribution changed over the past 10 years, a similar
survey was conducted in September 2010 by selecting a random sample
of 100 chemistry majors. The results indicated a sample mean of
1.82...
A 200 mL solution of .100 M solution of Ammonia, NH3, is slowly mixed with .100...
A 200 mL solution of .100 M solution of Ammonia, NH3, is slowly
mixed with .100 M HCl. Determine the pH after addition of: 0 ml of
HCl, 50 mL of HCl, 100 mL of HCl, 200 mL of HCl, and 250 mL of
HCl.
A 200 mL solution of .100 M solution of Ammonia, NH3, is slowly mixed with .100...
A 200 mL solution of .100 M solution of Ammonia, NH3, is slowly
mixed with .100 M HCl. Determine the pH after addition of: 0 ml of
HCl, 50 mL of HCl, 100 mL of HCl, 200 mL of HCl, and 250 mL of
HCl.
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