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
Whitepunk [10]
3 years ago
11

Which of the following statements are TRUE of buffer solutions? 1. A buffer solution can be made by mixing equal concentrations

of ​ acetic acid and sodium acetate. 2. A buffer solution can be made by mixing equal concentrations of ​ hydrochloric acid and sodium chloride. 3. A buffer solution resists changes in pH when small quantities of acid ​ or base are added.
Chemistry
1 answer:
Leokris [45]3 years ago
5 0

Answer:

Option 1 and 3 are correct.

Explanation:

Buffer solution is the solution which resists the change in the magnitude of the pH when small additions of either acid or base is added.  Buffer solutions consist of weak acid and its conjugate base usually which are mixed in relatively equal and large quantities.

Hence,

Option 1. is correct because acetic acid is a weak acid and sodium acetate is the conjugate base of it which are mixed in equal concentrations.

Option 2. is incorrect because HCl and NaCl are both strong acid and salt respectively and will not form a buffer.

Option 3. is correct which is the definition of a buffer solution.

Option 1 and 3 are correct.

You might be interested in
Elements that have atoms with stable valence electron configurations in the ground state are found in
dsp73

Answer:

Group 18, also known as the Noble Gasses

Explanation:

Atoms strive for full stability by gaining or losing electrons to get 8 valence electrons in their valence shell, but Group 18 already has 8 electrons in their valence shell, and are therefore already stable in their ground state.

5 0
2 years ago
The energy required to ionize boron is 801 kJ/mol. You may want to reference (Pages 93 - 98) Section 2.5 while completing this p
earnstyle [38]

Answer:

The frequency is  f =  2,01 * 10^{15} \  Hz

Explanation:

From the question we are told that

   The energy required to ionize boron is E_b  =  801 KJ/mol

Generally the ionization energy of boron pre atom is mathematically represented as

     E_a  =  \frac{E_b}{N_A}

Here  N_A is the Avogadro's constant with value N_A  =  6.022*10^{23}

So

      E_a  =  \frac{801}{6.022*10^{23}}

=>     E_a  =  1.330 *10^{-18} \  J/atom

Generally the energy required to liberate one electron from an atom is equivalent to the ionization energy per atom and this mathematically represented as

       E =  hf  =  E_a

=>     hf  =  E_a

Here h is the Planks constant with value h = 6.626 *10^{-34}

So

       f =  \frac{1.330 *10^{-18}}{ 6.626 *10^{-34}}

=>      f =  2,01 * 10^{15} \  Hz

8 0
2 years ago
If the initial concentration of a is 0.00540 m, what will be the concentration after 795 s?
zavuch27 [327]
<span>Feb 19, 2014 - The units of k tell you that this is a second order reaction. So, to solve this, you need to use the integrated rate law for a 2nd order reaction: 1/[A] = kt + 1/[A]o 1/[A] = 0.540/Ms (835 s) + 1/0.00640 1/[A] = 607 [A] = 1.65X10^-3 M.</span><span>
</span>
7 0
3 years ago
Acidic solutions contain high concentrations of
finlep [7]

Answer:

hydrogen ions

Explanation:

because acid is the specie that have ability to donate proton or forming bond with electron pair

6 0
3 years ago
Nature operates the same way everywhere in the universe except where we have evidence
babunello [35]

Answer:

true

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • If the daily allowance for Vitamin C is assumed to be 75.0 mg, how many liters (L) of a 0.002486 M solution of ascorbic acid wou
    15·1 answer
  • Which group iia metal magnesium or calcium is more active cite your evidence?
    8·1 answer
  • Can u please help me with these 2 answers!
    5·1 answer
  • A flask contains 0.280 mol of liquid bromine, br2. Determine the number of bromine molecules present in the flask.
    12·1 answer
  • A sound wave is traveling at 331 m/s and has a frequency of 126 Hz. What is the wavelength?​
    8·1 answer
  • A 30.0 mL sample of phosphoric acid is neutralized with 18.0 mL of a 3.00 M NaOH solution in a titration.
    5·1 answer
  • 2. What is the relationship between the scientific method and bias? Explain in detail.
    6·1 answer
  • Provide an explanation at the subatomic level to explain why different colors are observed for different metal salts.
    14·2 answers
  • A tank has 1.90 mols of Nz gas under a pressure of 4.972 atm at 31.8 °C.
    15·2 answers
  • When the motor has finished pulling the roller coaster car to the top of the very first hill, what moves the car down the hill?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!