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
Nutka1998 [239]
3 years ago
11

Phosphate buffers are commonly used in biological research. If a small amount of strong acid is added to a buffer solution that

is 0.700 M H3PO4 and 0.700 M KH2PO4, which of the following statements is true?
A) [H3PO4] will increase, [KH2PO4] will decrease, and pH will slightly decrease.
B) [H3PO4] will increase, [KH2PO4] will decrease, and pH will not change.
C) [H3PO4] will decrease, [KH2PO4] will increase, and pH will slightly decrease.
D) [H3PO4] will decrease, [KH2PO4] will increase, and pH will slightly increase.
E) [H3PO4] will increase, [KH2PO4] will decrease, and pH will slightly increase.
F) [H3PO4] will decrease, [KH2PO4] will increase, and pH will not change
Chemistry
1 answer:
lozanna [386]3 years ago
4 0

Answer:

A) [H3PO4] will increase, [KH2PO4] will decrease, and pH will slightly decrease.

Explanation:

A buffer is a solution which resists changes to its pH when a small amount of acid or base is added to it.

Buffers consist of a weak acid (HA) and its conjugate base (A–) or a weak base and its conjugate acid. Weak acids and bases do not completely dissociate in water, and instead exist in solution as an equilibrium of dissociated and undissociated species. When a small quantity of a strong acid is added to a buffer solution, the conjugate base, A-, reacts with the hydrogen ions from the added acid to form the weak acid and a salt thereby removing the extra hydrogen ions from the solution and keeping the pH of the solution fairly constant. On the other hand, if a small quantity of a strong base is added to the buffer solution, the weak acid dissociates further to release hydrogen ions which then react with the hydroxide ions of the added base to form water and the conjugate base.

For example, if a small amount of strong acid is added to a buffer solution that is 0.700 M H3PO4 and 0.700 M KH2PO4, the following reaction is obtained:

KH₂PO₄ + H+ ----> K+ + H₃PO₄

Therefore, [H₃PO₄] will increase, [KH₂PO₄] will decrease, and pH will slightly decrease.:

You might be interested in
Which of the following animals exhibits bilateral symmetry?
GarryVolchara [31]
Option three, starfish is the correct answer since if you draw a line between it, it would be even!
5 0
3 years ago
Read 2 more answers
How many moles are in 59.6 grams of BaSO4​
AysviL [449]

Answer:

0.2553669915026199 BaSO4

Explanation:

hi, give brainliest?

3 0
2 years ago
Which of the following is correct for adsorption theory of Heterogeneous catalysis? Statement-I : This theory explains why the c
Ostrovityanka [42]

Answer:

The correct answer is - Statement I is true, Statement-II is false.

Explanation:

3 0
3 years ago
Chemistry question please help!!
LiRa [457]
Answer: It’s the first one
8 0
2 years ago
A 10​-liter ​[l] flask contains 1.4 moles​ [mol] of an ideal gas at a temperature of 20 degrees celsius ​[degrees​c]. What is th
Lynna [10]

The pressure in the flask is 3.4 atm.

<em>pV</em> = <em>nRT </em>

<em>T</em> = (20 + 273.15) K = 293.15 K

<em>p</em> = (<em>nRT</em>)/<em>V</em> = (1.4 mol × 0.082 06 L·atm·K⁻¹mol⁻¹ × 293.15 K)/10 L = 3.4 atm

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which occurs whenever valence electrons are shared or transferred between atoms
    15·1 answer
  • What is the oxidation number of a pure element?
    10·1 answer
  • What is the unit of measurement used to express density
    8·1 answer
  • Only the _______
    14·1 answer
  • Reptiles, amphibians, and fish are all cold-blooded animals. Their body temperatures are determined by their surroundings. How d
    11·1 answer
  • What would be a correct unit of measurement for velocity?
    5·2 answers
  • . Write the balanced equation, then outline the steps necessary to determine the information requested in each of the following:
    7·1 answer
  • Thor pushes a car with a mass of 2500 kg. It accelerates 5 m/s2. How much force did Thor apply?
    5·1 answer
  • Hello! May I please get some help here? :) Giving brainliest
    13·3 answers
  • Which salt is produced when H₂SO4 reacts with NaOH?<br> O K₂SO3<br> O Na₂SO4<br> O Na₂SO3<br> OK₂SO4
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!