1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
gulaghasi [49]
3 years ago
14

You wish to construct a buffer of pH=7.0. Which of the following weak acids (w/ corresponding conjugate base) would you select?

Chemistry
1 answer:
Alex17521 [72]3 years ago
3 0

Answer:

C.) HOCl Ka=3.5x10^-8

Explanation:

In order to a construct a buffer of pH= 7.0 we need to find the pKa values of all the acids given below

we Know that

pKa= -log(Ka)

therefore

A) pKa of  HClO2 = -log(1.2 x 10^-2)

=1.9208

B) similarly PKa of HF= -log(7.2 x 1 0^-4)= 2.7644

C)  pKa of HOCl= -log(3.5 x 1 0^-8)= 7.45

D) pKa of HCN = -log(4 x 1 0^-10)=  9.3979

If we consider the  Henderson- Hasselbalch equation for the calculation of the pH of the buffer solution

The weak acid for making the buffer must have a pKa value near to the desired pH of the weak acid.

So, near to value, pH=7.0. , the only option is HOCl whose pKa value is 7.45.

Hence, HOCl will be chosen for buffer construction.

You might be interested in
Which best describes a neutralization reaction?
Softa [21]
A reaction between to acids
3 0
3 years ago
1. ___Mg +<br> O2 → __Mgo<br> What type of reaction is shown
Black_prince [1.1K]

Explanation:

In first one it should be 2Mg

and in second = 2Mgo

hope it helps....

8 0
3 years ago
How many moles are in 1.51 x 10^26 atoms of xenon? will mark brainlyest
zhuklara [117]

0.94Answer:

Explanation:

TO find the number of moles in a substance given its number of  

entities we use the formela

7 0
3 years ago
URGENT!
tensa zangetsu [6.8K]

Answer:

D

Explanation:

A weak acid and a strong base will form a basic salt.

Option A is acidic, this pH would be found in salts formed from reactions between strong acids and weak bases.

B and C are neutral or close to neutral and as such will be formed from weak acids and weak bases, or strong acids and strong bases.

5 0
3 years ago
Read 2 more answers
A tank of gas has partial pressures of nitrogen and oxygen equal to 1.61 × 104 kPa and 4.34 × 103 kPa , respectively.What is t
Alchen [17]

Answer:

20.44\times 10^3 kPa is the total pressure of the tank.

Explanation:

Partial pressures of nitrogen = p_{N_2}=1.61\times 10^4 kPa

Partial pressure of oxygen =  p_{O_2}=4.34\times 10^3 kPa

Total pressure of gases in the tank = P

Applying Dalton's law of partial pressures :

P=p_{N_2}+p_{O_2}=1.61\times 10^4 kPa+4.34\times 10^3 kPa

P=20.44\times 10^3 kPa

20.44\times 10^3 kPa is the total pressure of the tank.

7 0
3 years ago
Other questions:
  • What is the purpose of the three R’s of resource management?
    11·2 answers
  • Which of the following is a balanced chemical equation?Which of the following is a balanced chemical equation?
    11·1 answer
  • Enter your answer in the provided box. For the simple decomposition reaction AB(g) → A(g) + B(g) rate = k[AB]2 and k = 0.20 L/mo
    7·1 answer
  • Daniel has a sample of pure copper.its mass is 89.6 grams (g),and its volume is 10 cubic centimeters (cm3). whats the destiny of
    14·1 answer
  • A compound containing phosphorus and oxygen has a molar mass of 219.9 g/mol and an empirical formula of p2o3. Determine its mole
    11·1 answer
  • Wat two common uses for Zinc???
    12·1 answer
  • What are the answers to all of these, I NEED HELP ASAP
    10·1 answer
  • Draw a mechanism for the reaction of methanol with sodium amide. In the box to the left, draw any necessary curved arrows. Show
    8·1 answer
  • Round and put into scientific notations 5.624 + 3.19 - 0.2
    11·1 answer
  • I need help pleaseee
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!