Q2) What is the pH at which a buffer composed of CO32- and HCO3- would be...
Q2) What is the pH at which a buffer composed of CO32- and HCO3- would be most effective at resisting pH change? Round your answer to 2 decimal places. Remember you can find KA and/or KB values in your textbook
Homework Answers
Sol.
As Ka of HCO3- = 4.8 × 10-11
So , pKa = - log(Ka) = - log( 4.8 × 10-11 ) = 10.32
As Henderson - Hasselbalch equation ,
pH = pKa + log ( [CO32-] / [HCO3-] )
pH would be most effective , when , the concentration of conjugate base , CO32- and concentration of acid , HCO3- are equal
That is , [HCO3-] = [CO32-]
So , pH = pKa + log ( 1 ) = pKa
pH = 10.32
Add Answer to:
Q2) What is the pH at which a buffer composed of CO32- and HCO3-
would be...
What is the pH at which a buffer composed of CO32- and HCO3- would be most...
What is the pH at which a buffer composed of CO32- and HCO3- would be most effective at resisting pH change? I think the answer is 10.32 but I wanted to check.
1.What is the pH at which a buffer composed of NH3 and NH4+ would be most...
1.What is the pH at which a buffer composed of NH3 and NH4+ would be most effective at resisting pH change? Round your answer to 2 decimal places. Remember you can find KA and/or KB values in your textbook in chapter 15. 2. Consider a 1.0 L buffer containing 0.119 mol L-1 HF and 0.081 mol L-1 F-. What is the pH of the solution after adding 5.7 x 10-3 mol of NaOH? Express your answer to 2 decimal places....
What is the pH at which a buffer composed of NH3 and NH4+ would be most...
What is the pH at which a buffer composed of NH3 and NH4+ would be most effective at resisting pH change? Round your answer to 2 decimal places.
What is the pH at which a buffer composed of CH3NH2 and CH3NH3+ would be most...
What is the pH at which a buffer composed of CH3NH2 and CH3NH3+ would be most effective at resisting pH change? Round your answer to 2 decimal places.
A 12.1 ml solution of 0.100 mol L-' HF is titrated using 0.150 mol L-1 NaOH....
A 12.1 ml solution of 0.100 mol L-' HF is titrated using 0.150 mol L-1 NaOH. What is the pH of the solution after 3.23 ml of the NaOH solution is added? Express your answer to 2 decimal places. You have 5 attempts at this question. Remember you can find K, and/or Ką values in your textbook in chapter 15. Answer: 12.402 incorrect Try again What is the pH at which a buffer composed of CO32- and HCO31 would be...
HCO3- + H2O CO32- + As drawn, the acid in the reaction is (HCO3- ) and the...
HCO3- +
H2O
CO32- +
As drawn, the acid in the reaction is
(HCO3- ) and the base is (
H2O)
The conjugate acid is ( CO32- ) and the
conjugate base is (H3O+ )
b) If a solution has a H3O+ concentration
of 0.817 M, what is the pH? Provide your answer with 2 decimal
places (13.91)
can you please check my answers? Thanks!
can someone please help me with these 3 questions? Consider a 1.0 L buffer containing 0.098...
can someone please help me with these 3 questions?
Consider a 1.0 L buffer containing 0.098 mol L. HCOOH and 0.107 mol L'HCOO : What is the pH of the solution after adding 7.8 x 10-3 mol of NaOH? Express your answer to 2 decimal places. You have 5 attempts at this question. Remember you can find KA and/or Kg values in your textbook in chapter 15. Answer: Check What is the pH of a solution containing 0.489 mol L...
What is the pH of a solution containing 0.138 mol L-1 NH3 and 0.253 mol L-1...
What is the pH of a solution containing 0.138 mol L-1 NH3 and 0.253 mol L-1 NH4+? Round your answer to 2 decimal places. Remember you can find KA and/or KB values in your textbook in chapter 15.
Consider a 1.0 L buffer containing 0.082 mol L-1 CH3COOH and 0.088 mol L-1 CH3COO-. What...
Consider a 1.0 L buffer containing 0.082 mol L-1 CH3COOH and 0.088 mol L-1 CH3COO-. What is the pH of the solution after adding 6.5 x 10-3 mol of NaOH? Express your answer to 2 decimal places. You have 5 attempts at this question. Remember you can find KA and/or KB values in your textbook in chapter 15.
TABLE 15.5 Acid lonization Constants (K) for Some Monoprotic Weak Acids at 25 °C Acid Formula...
TABLE 15.5 Acid lonization Constants (K) for Some Monoprotic Weak Acids at 25 °C Acid Formula Structural Formula lonization Reaction К. pk, = -log (2) Chlorous acid HCIO H-0-C=0 1.1 x 10-2 1.96 Stronger acids Nitrous acid HNOZ H-O-NO 5.6 x 10-4 HCIO2(aq) + H2011) = H30* (aq) + CO2 (aq) HNO2(aq) + H20(I) = H30+ (aq) + NO2 (aq) HF(aq) + H20(1) = H30* (aq) + F"(aq) 3.25 Hydrofluoric acid HF H-F 6.3 x 10-4 3.20 O Methanoic acid...
A 12.1 ml solution of 0.100 mol L-' HF is titrated using 0.150 mol L-1 NaOH. What is the pH of the solution after 3.23 ml of the NaOH solution is added? Express your answer to 2 decimal places. You have 5 attempts at this question. Remember you can find K, and/or Ką values in your textbook in chapter 15. Answer: 12.402 incorrect Try again What is the pH at which a buffer composed of CO32- and HCO31 would be...
HCO3- +
H2O
CO32- +
As drawn, the acid in the reaction is
(HCO3- ) and the base is (
H2O)
The conjugate acid is ( CO32- ) and the
conjugate base is (H3O+ )
b) If a solution has a H3O+ concentration
of 0.817 M, what is the pH? Provide your answer with 2 decimal
places (13.91)
can you please check my answers? Thanks!
can someone please help me with these 3 questions?
Consider a 1.0 L buffer containing 0.098 mol L. HCOOH and 0.107 mol L'HCOO : What is the pH of the solution after adding 7.8 x 10-3 mol of NaOH? Express your answer to 2 decimal places. You have 5 attempts at this question. Remember you can find KA and/or Kg values in your textbook in chapter 15. Answer: Check What is the pH of a solution containing 0.489 mol L...
TABLE 15.5 Acid lonization Constants (K) for Some Monoprotic Weak Acids at 25 °C Acid Formula Structural Formula lonization Reaction К. pk, = -log (2) Chlorous acid HCIO H-0-C=0 1.1 x 10-2 1.96 Stronger acids Nitrous acid HNOZ H-O-NO 5.6 x 10-4 HCIO2(aq) + H2011) = H30* (aq) + CO2 (aq) HNO2(aq) + H20(I) = H30+ (aq) + NO2 (aq) HF(aq) + H20(1) = H30* (aq) + F"(aq) 3.25 Hydrofluoric acid HF H-F 6.3 x 10-4 3.20 O Methanoic acid...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago