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Buffer Solutions
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Questions (707)
if 400 mL of 0.1 M NaH2PO4 is mixed with 100 mL of 0.1 M H3PO4 what is the pH of the buffer mixture? The PKa of H3PO4 is 2.1.
3 answers
asked by
nikki
598 views
Which one of the following pairs of 0.100 mol L-1 solutions, when mixed, will produce a buffer solution?
A. 50. mL of aqueous
4 answers
asked by
Macky
4,338 views
A 1.0L buffer solution contains 0.100 mol of HC2H3O2
and 0.100 mol of NaC2H3O2 The value of Ka for HC2H3O2 is 1.8×10−5.
3 answers
asked by
Anonymous
1,241 views
What mass of K2HPO4 must be added to 1 L of .1 M K3PO4 to prepare a buffer solution with a pH of 10.8? Answer in units of grams.
4 answers
asked by
Avery
1,493 views
what is the ph of a buffer made by mixing 2.00g of sodium acetate with 20.00ml of 1.20 mol/l acetic acid and adding enough water
4 answers
asked by
mehek
645 views
Consider a buffer solution consisting of CH3NH3Cl and CH3NH2. Which of the following statements are true concerning this
3 answers
asked by
bekah
3,296 views
How would you calculate the pH of the buffer if 1.0mL of 5.0M NaOH is added to 20.0mL of this buffer?
Can someone please explain
5 answers
asked by
Airin
1,275 views
A buffer is created by mixing equal concentrations of NH4+ and NH3. Calculate the volume of both solutions needed to create a
4 answers
asked by
Bodhi
1,550 views
Calculate the pH of a buffer solution containing 1.0 mol/dm3 CH3COONa
2 answers
asked by
Linda
480 views
How many moles of NH4Cl must be added to 1.5L of 0.2 M solution of NH3 to form a buffer whose PH is 9.(Kb=1.8x10^-5)
6 answers
asked by
Zekariyas
2,115 views
What is the pH of a buffer solution if you have 250 ml of a 1.56M Acetic Acid and you added 26.56 grams of sodium acetate
3 answers
asked by
lilly
612 views
. An enzyme-catalyzed reaction was carried out in a 0.2M �Tris� buffer, pH 7.8. As a result of the reaction, 0.03 mole/liter
4 answers
asked by
pankaj
2,799 views
Which of these pairs of substances in aqueous solution would constitute a buffer?
a. HCl + KCl b. KHPO4 + K2HPO4 c. KOH + KCl d.
4 answers
asked by
anonymous
1,600 views
What concentration of ammonia, [NH3], should be present in a solution with [NH4+]= 0.734M to produce a buffer solution with pH=
4 answers
asked by
rooftops
901 views
A 500.0-mL buffer solution is 0.100 M in HNO2 and 0.150 M in KNO2. Determine whether or not
each of the following additions would
4 answers
asked by
Johannie
3,838 views
If you mixed equal volume of .1 M HCl and .20 M Tris (pka=8.3), IS THE RESULTING SOLUTION A BUFFER SOLUTION?
2 answers
asked by
FRED JOHNSON
629 views
When a base is introduced into this buffer, which of H2CO3 and HCO3− reacts with the base to maintain the pH of the solution?
H
4 answers
asked by
Jennifer
1,332 views
Determine the pH of a buffer made from 250 ml of 0.50M HF and 150 ml of 0.75 M NaF.
4 answers
asked by
Sara
750 views
The ionization constant of HA is 1 × 10−6
. What must be the ratio of [A−] to [HA] for the preparation of a buffer solution
3 answers
asked by
Anonymous
1,086 views
What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M
3 answers
asked by
Yanis
426 views
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.240 M sodium benzoate.
Ho
4 answers
asked by
Jematormal91
3,731 views
1. MES (2-(N-Morpholino)ethanesulfonic acid) is a common buffer used in biochemistry labs to stabilize proteins. The pKa for MES
4 answers
asked by
Peter
1,511 views
12 mL of 0.0100 M HCl are added to 25.0 mL of a buffer solution that is 0.010 M HC2H3O2 and 0.08 M C2H3O2-. What is the pH of
3 answers
asked by
tim
642 views
What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and
3 answers
asked by
Kasey
2,487 views
In a buffer solution, if [Aƒ{] < [HA], which of the following must be true?
a. pH < pKa b. pH = pKa c. pH > pKa d. pH < 7.00 e.
4 answers
asked by
miller
2,563 views
Which of the following mixtures will be a buffer when dissolved in a liter of water?
a. 0.1 mol Ca(OH)2 and 0.3 mol HI b. 0.3 mol
3 answers
asked by
George2
2,574 views
How many grams of sodium acetate( molar mass 82.03 g/mol) must me added to 1.00L of a 0.200M acetic acid solution to form a
3 answers
asked by
Catherine
2,089 views
You prepare a buffer solution by dissolving 2.00 g each of benzoic acid, C6H5COOH, and
sodium benzoate, NaC6H5COO, in 750.0 mL
3 answers
asked by
peachy
1,382 views
1) A buffer solution was made by adding 6.56g of sodium ethanoate to 1dm3 of 0.02moldm-3 ethanoic acid.
a) What is the
4 answers
asked by
Roxy
1,052 views
Calculate the ratio of the concentration of CO3-2 & HCO3- ions needed to achieve buffering at pH= 9.50. The PkA2 of H2CO3 is
3 answers
asked by
Zekariyas
1,555 views
3. Determine the pH if 0.02 mol of NaOH is added to 1.0L of the buffer described in question #1.
question1: 1. How many grams of
3 answers
asked by
KO
656 views
prepare a phosphate buffer with pH= 7 from solid NaH2PO4 (pKa =7.21) and Na2HPO4.
1) calculate the ratio of [CB]/[acid] I got the
3 answers
asked by
prepare a phosphate buffer with pH= 7
906 views
A chemist needs to prepare a buffer solution of pH 8.80. What molarity of NH3 (pKb = 4.75) is required to produce the buffer
4 answers
asked by
Cortney
1,829 views
What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M
3 answers
asked by
Yanis
2,207 views
Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the
3 answers
asked by
Alexander
560 views
If a researcher needs 0.50 L of 3.0 M nitrite buffer at pH 3.00, then she knows that the concentration of nitrous acid
4 answers
asked by
Mike
684 views
what is the [CH3COO^-]/[CH3COOH] ration in an acetate buffer (Ka=1.76 x 10^-5) at pH 3.8? show calculations
3 answers
asked by
kabelo
1,065 views
Which of the following mixtures would result in buffered solutions when 1.0 L of each of the two solutions are mixed?
a) 0.10 M
3 answers
asked by
Saira
1,513 views
How many grams of dry NH4Cl need to be added to 1.80L of 0.200M solution of ammonia,NH3, to prepare a buffer that has a pH of
5 answers
asked by
Jennifer
1,577 views
Calculate the relative concentrations of NaH2PO4 and H3PO4 required, giving a solution, which buffers at pH 2.6. (The pKa1 for
3 answers
asked by
Seetha
437 views
What happens when a base is added to a system with a buffer and which part of the buffer reacts with the added base?
1 answer
asked by
Student
331 views
How much Tris-Acetate-EDTA (TAE) stock buffer (3.25 M) is required to make 400 ml of solution that has a concentrations of 250
3 answers
asked by
Abedalrahman Addassi
635 views
fin the ph for buffer 0.12m,0.16m NaN02 with the given ka(HNO2)= .5x10^-
5
3 answers
asked by
exo-l
946 views
A buffer consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbonated soft drinks also use
3 answers
asked by
SALLY
1,965 views
If you added 4mL NaOH 1 M to your 100 mL buffer, would it still be a usable
buffer according to our conventions? Explain why or
3 answers
asked by
salman
810 views
What should the molar concentrations of benzoic acid and sodium benzoate be in a solution that is buffered at a pH of 4.84 and
4 answers
asked by
B
1,325 views
Calculate the volume of 0.05 M NaOH which must be added to 100 cm3 of 0.05 M methanoic acid to obtain a buffer of pH 4.23. (Ka
3 answers
asked by
Carlos
848 views
How many milliliters of a 0.250 M acetic acid solution must be added to 50.0
mL of a 0.750 M NaOH solution to produce a buffer
3 answers
asked by
Anon
936 views
A student was required to prepare 250.0 mL of a hypochlorous acid/sodium hypochlorite buffer in which the concentration of the
3 answers
asked by
Luke
833 views
Need help with my pH calculations?
1) 0.10 mol of solid sodium hydrogen carbonate and 0.20 mol of solid sodium carbonate are
4 answers
asked by
dan
812 views
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Acid-Base Chemistry
Acid-Base Equilibria
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