A buffer is to be made up with a mixture of H2PO4- and HPO42-, how many...
A buffer is to be made up with a mixture of H2PO4- and HPO42-, how many grams of HPO42- is needed for a buffer of pH=7.5 if the solution contains .0015 mol of H2PO4-
Ka of H2PO4- is 6.2x10-8
Homework Answers
Add Answer to:
A buffer is to be made up with a mixture of
H2PO4- and
HPO42-, how many...
1. A buffer is prepared using 0.20 mol of H2PO4 and 0.10 mol of HPO42 in 500 mL of solution. Will...
1. A buffer is prepared using 0.20 mol of H2PO4 and 0.10 mol of HPO42 in 500 mL of solution. Will the buffer capacity be exceeded if 5.6 g of KOH is added to it? What is the pH of the original solution and the pH of the new solution? (Kb 1.6 x 10-7) 2. How many milliliters of 0.113M HBr should be added to 52.2 ml of 0.0134 M morpholine to give a pH of 8? (The pKa of...
a buffer solution in which [h2po4-]=[HPO4-2]=0.132 Ka=6.2x10-8 a) what is the pH of the buffer when...
a buffer solution in which [h2po4-]=[HPO4-2]=0.132 Ka=6.2x10-8 a) what is the pH of the buffer when you add 100mL H2O to the mixture? b) what is the PH of the Buffer of the mixture? c) what is the pH of the buffer after adding 0.425 g NaOH in 2 liters of the buffer?
A buffer, consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbonated...
A buffer, consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system. What is the pH of a soft drink in which the major buffer ingredients are 7.30 g of NaH2PO4 and 7.80 g of Na2HPO4 per 355 mL of solution?
1. If you are to make 1 L of a 0.1 M H2PO4- / HPO42- (pKa2...
1. If you are to make 1 L of a 0.1 M H2PO4- / HPO42- (pKa2 = 6.9) buffer at pH 6.9 and you start with the NaH2PO4, how many grams of NaH2PO4 is needed? Do you then add HCl or NaOH to make the final buffer and how moles of HCl or NaOH is needed? MW for NaH2PO4 is 120.
Acid Acid Dissociation Constant, Ka H3PO4 7 x 10-3 H2PO4- 8 x 10-8 HPO42- 5 x...
Acid Acid Dissociation Constant, Ka H3PO4 7 x 10-3 H2PO4- 8 x 10-8 HPO42- 5 x 10-13 On the basis of the information above, a buffer with a pH = 9 can best be made by using A. H3PO4 + H2PO4- B. H2PO4- + PO43- C. H2PO4- + HPO42- D. HPO42- + PO43-
Calculate the ratio of the molar concentrations of HPO42- and H2PO4- ions required to obtain a...
Calculate the ratio of the molar concentrations of HPO42- and H2PO4- ions required to obtain a buffer solution at pH = 7.0. For phosphoric acid, Ka1 = 7.5 × 10-3 Ka2 = 6.2 × 10-8 Ka3 = 4.2 × 10-13
Calculate the pH and the equilibrium concentrations of H2PO4-, HPO42- and PO43- in a 0.0287 M...
Calculate the pH and the equilibrium concentrations of H2PO4-, HPO42- and PO43- in a 0.0287 M aqueous phosphoric acid solution. For H3PO4, Ka1 = 7.5×10-3, Ka2 = 6.2×10-8, and Ka3 = 3.6×10-13 pH = [H2PO4-] = [HPO42-] = [PO43-] =
A buffer is made by mixing equal amounts of weak acid H2PO4 and its conjugate base...
A buffer is made by mixing equal amounts of weak acid H2PO4 and its conjugate base PO42-. The chemical equation for the buffer is H2PO4 + H20 = P042- + H30+ Calculate the pH of the buffer solution knowing that Ka-6.3x10-8
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...
Calculate the pH of a buffered solution that is 0.35 M H2PO4- and 0.75 M HPO42-....
Calculate the pH of a buffered solution that is 0.35 M H2PO4- and 0.75 M HPO42-. The Ka = 6.2 x 10-8.
1. A buffer is prepared using 0.20 mol of H2PO4 and 0.10 mol of HPO42 in 500 mL of solution. Will the buffer capacity be exceeded if 5.6 g of KOH is added to it? What is the pH of the original solution and the pH of the new solution? (Kb 1.6 x 10-7) 2. How many milliliters of 0.113M HBr should be added to 52.2 ml of 0.0134 M morpholine to give a pH of 8? (The pKa of...
A buffer is made by mixing equal amounts of weak acid H2PO4 and its conjugate base PO42-. The chemical equation for the buffer is H2PO4 + H20 = P042- + H30+ Calculate the pH of the buffer solution knowing that Ka-6.3x10-8
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...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago