Methane (CH4) is a very weak acid with a pKa of approximately 50. In a 1000...
Methane (CH4) is a very weak acid with a pKa of approximately 50. In a 1000 L solution of 0.001 M dissolved methane approximately how many molecules of methane are in the conjugate base form (CH3-)?
Homework Answers
![putting the value of [CH4] & Ka in equation 1 We get c2 0 001 M 10-50 M- 3.162 X 1024 M -3.162>< 10-24 mol/L That means 1 L contains 3.162 X 1024 mol of [CH3] That means 1000 L wil contain 3.162 X 1024 x 1000 mol of ICH3] -3.162 X1021 mol 1 mol contains 6.022 X 1023 molecule. So 3.162 X 10-21 mol 6022x 1023X 3162>< 10-21 molecule -1904 molecule. will contain](http://img.homeworklib.com/questions/b6a37a60-5674-11eb-8e05-71c9f2e99872.png?x-oss-process=image/resize,w_560)
Add Answer to:
Methane (CH4) is a very weak acid with a pKa of approximately
50. In a 1000...
A solution of a weak acid acid has three times as many conjugate acid molecules as...
A solution of a weak acid acid has three times as many conjugate acid molecules as conjugate base molecules. If the pKa of lactic acid is 3.85, what is the pH of such a solution?
Question 39 1 pts A weak acid (HA) reacts with a weak base (B) to form the conjugate base of the acid (A) and the conjugate acid of the base (B-H the pKa of HA was 4.8 and the pKa of BH* (i.e., the p...
Question 39 1 pts A weak acid (HA) reacts with a weak base (B) to form the conjugate base of the acid (A) and the conjugate acid of the base (B-H the pKa of HA was 4.8 and the pKa of BH* (i.e., the pKabH of B) was 9.4, what would be the value of the equilibrium constant for the above reaction to the nearest ones? Obviously, by expressing the answer to the nearest ones, we are using too many...
Design a buffer that has a pH of 5.85 using one of the weak base/conjugate acid...
Design a buffer that has a pH of 5.85 using one of the weak base/conjugate acid systems shown below. Weak Base Kb pka 10.62 CH3NH2 C6H1503N C3H5N 4.2x10-4 5.9x10-7 1.5*10-9 Conjugate Acid CH3NH2+ CGH1503NH+ CsH5NH ка 2.4x10-11 1.7*10-8 6.7x10-6 7.77 5.17 How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams bromide...
Design a buffer that has a pH of 4.77 using one of the weak acid/conjugate base...
Design a buffer that has a pH of 4.77 using one
of the weak acid/conjugate base systems shown below.
Weak Acid
Conjugate Base
Ka
pKa
HC2O4-
C2O42-
6.4×10-5
4.19
H2PO4-
HPO42-
6.2×10-8
7.21
HCO3-
CO32-
4.8×10-11
10.32
How many grams of the potassium salt of the
weak acid must be combined with how many grams of the
potassium salt of its conjugate base, to produce
1.00 L of a buffer that is 1.00 M
in the weak base?
grams potassium...
Design a buffer that has a pH of 4.45 using one of the weak base/conjugate acid...
Design a buffer that has a pH of 4.45 using one of the weak base/conjugate acid systems shown below. Weak Base Kb Conjugate Acid Ka pKa CH3NH2 4.2×10-4 CH3NH3+ 2.4×10-11 10.62 C6H15O3N 5.9×10-7 C6H15O3NH+ 1.7×10-8 7.77 C5H5N 1.5×10-9 C5H5NH+ 6.7×10-6 5.17 How many grams of the chloride salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams chloride...
(17.2.c.7) Consider how to prepare a buffer solution with pH = 7.53 (using one of the weak acid/conjugate base systems s...
(17.2.c.7) Consider how to prepare a buffer solution with pH = 7.53 (using one of the weak acid/conjugate base systems shown here) by combining1.00 L of a 0.357-M solution of weak acid with 0.300 M sodium hydroxide. Weak Acid Conjugate Base Ka pKa HNO2 NO2- 4.5 x 10-4 3.35 HClO ClO- 3.5 x 10-8 7.46 HCN CN- 4.0 x 10-10 9.40 How many L of the sodium hydroxide solution would have to be added to the acid solution of your...
Consider a weak base that has a pKb of 4.2. • What is the pKa of...
Consider a weak base that has a pKb of 4.2. • What is the pKa of this solution? • What is the pH of a 0.2 M solution of this base? • If you were to mix 50 mL of the 0.2 M base with 50 mL of a 0.1 M solution of its conjugate acid, what would the pH of this buffer be, and what is its effective buffering range?
Design a buffer that has a pH of 9.88 using one of the weak base/conjugate acid...
Design a buffer that has a pH of 9.88 using one of the weak base/conjugate acid systems shown below. Weak Base Кр Conjugate Acid Ka pKa + CH3NH2 4.2x10-4 CH2NH3 2.4x10-11 10.62 CGH1503N 5.9x10-7 C6H1503NH 1.7x10-8 7.77 C3H5N 1.5x10-9 C3H5NH 6.7x10-6 5.17 How many grams of the chloride salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams...
In a solution of the weak acid DNP (pKa 4.11) in water, [H3O+] = 9.4 x...
In a solution of the weak acid DNP (pKa 4.11) in water, [H3O+] = 9.4 x 10^-4 M and DNX, the conjugate base, has a concentration of 0.00180 M. A.) What is the concentration of DNP in the above solution? B.) What is the pH of the solution?
Strong base is dissolved in 655 mL of 0.600 M weak acid (Ka = 4.06 x...
Strong base is dissolved in 655 mL of 0.600 M weak acid (Ka = 4.06 x 10-5) to make a buffer with a pH of 4.03. Assume that the volume remains constant when the base is added. HA(aq) + OH(aq) > H2O(l) + A (aq) Calculate the pKa value of the acid, and determine the number of moles of acid initially present. pKa = initial amount: mol HA When the reaction is complete, what is the concentration ratio of conjugate...
Question 39 1 pts A weak acid (HA) reacts with a weak base (B) to form the conjugate base of the acid (A) and the conjugate acid of the base (B-H the pKa of HA was 4.8 and the pKa of BH* (i.e., the pKabH of B) was 9.4, what would be the value of the equilibrium constant for the above reaction to the nearest ones? Obviously, by expressing the answer to the nearest ones, we are using too many...
Design a buffer that has a pH of 5.85 using one of the weak base/conjugate acid systems shown below. Weak Base Kb pka 10.62 CH3NH2 C6H1503N C3H5N 4.2x10-4 5.9x10-7 1.5*10-9 Conjugate Acid CH3NH2+ CGH1503NH+ CsH5NH ка 2.4x10-11 1.7*10-8 6.7x10-6 7.77 5.17 How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams bromide...
Design a buffer that has a pH of 4.77 using one
of the weak acid/conjugate base systems shown below.
Weak Acid
Conjugate Base
Ka
pKa
HC2O4-
C2O42-
6.4×10-5
4.19
H2PO4-
HPO42-
6.2×10-8
7.21
HCO3-
CO32-
4.8×10-11
10.32
How many grams of the potassium salt of the
weak acid must be combined with how many grams of the
potassium salt of its conjugate base, to produce
1.00 L of a buffer that is 1.00 M
in the weak base?
grams potassium...
Design a buffer that has a pH of 9.88 using one of the weak base/conjugate acid systems shown below. Weak Base Кр Conjugate Acid Ka pKa + CH3NH2 4.2x10-4 CH2NH3 2.4x10-11 10.62 CGH1503N 5.9x10-7 C6H1503NH 1.7x10-8 7.77 C3H5N 1.5x10-9 C3H5NH 6.7x10-6 5.17 How many grams of the chloride salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams...
Strong base is dissolved in 655 mL of 0.600 M weak acid (Ka = 4.06 x 10-5) to make a buffer with a pH of 4.03. Assume that the volume remains constant when the base is added. HA(aq) + OH(aq) > H2O(l) + A (aq) Calculate the pKa value of the acid, and determine the number of moles of acid initially present. pKa = initial amount: mol HA When the reaction is complete, what is the concentration ratio of conjugate...
Most questions answered within 3 hours.
-
An electron passes through a point 2.67 cm from a long straight
wire as it moves...
asked 28 minutes ago -
A grammar is a 4-tuple G, G = (Ν, Σ, Π, Σ, S) where, Ν is...
asked 1 hour ago -
In this part, calculate the present values. Use the Excel PV
function to compute the present...
asked 1 hour ago -
Part 1. Primitive Types, Sorting, Recursion for
Homework.java
a) Implement the static method initializeArray that receives...
asked 2 hours ago -
Using C++, build a sorter that can rank a sequence of numbers in
a descending order....
asked 2 hours ago -
Derive ground state term symbols. Use notation 2S(1/2) for state
2S1/2
a) d5
b) f3
c)...
asked 2 hours ago -
A sample of size 31 will be drawn from a population with mean 39
and standard...
asked 3 hours ago -
What is the effect on the P-value when a test is changed from a
two-tailed hypothesis...
asked 3 hours ago -
I wish to estimate µ, the mean of a population. After I collect
and an-
alyze...
asked 3 hours ago -
At a local university, you poll a group of 115 students and find
that 37 of...
asked 3 hours ago -
Gladstone company tracks the number of units purchased and sold
throughout each accounting period but applies...
asked 3 hours ago -
When determining if a molecule's configuration is E or Z, what
determines the higher priority groups?
asked 3 hours ago