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
True [87]
3 years ago
11

Which one of the following combinations cannot function as a buffer solution?

Chemistry
1 answer:
ANEK [815]3 years ago
3 0

Answer:

c.) HNO₃ & NaNO₃

Explanation:

A buffer system has 2 components:

  • A weak acid and its conjugate base or
  • A weak base and its conjugate acid

<em>Which one of the following combinations cannot function as a buffer solution? </em>

<em> a.) HCN & KCN.</em> YES. HCN is a weak acid and CN⁻ (coming from KCN)  its conjugate base.

<em> b.) NH₃ & (NH₄)₂SO₄.</em> YES. NH₃ is a weak base and NH₄⁺ (coming from (NH₄)₂SO₄) its conjugate acid.

<em> c.) HNO₃ & NaNO₃.</em> NO. HNO₃ is a strong acid.

<em>d.) HF & NaF.</em> YES. HF is a weak acid and F⁻ (coming from NaF)  its conjugate base.

<em> e.) HNO₂ & NaNO₂.</em> YES. HNO₂ is a weak acid and NO₂⁻ (coming from NaNO₂)  its conjugate base.

You might be interested in
Scientists are studying animals in a large lake area. In this lake area, both owls and raccoons eat ducks, and ducks eat frogs.
Stolb23 [73]

Answer:

Population of duck and frog will change with the change

Explanation:

The complete question is

Scientists are studying animals in a large lake area. In this lake area, both owls and raccoons eat ducks, and ducks eat frogs. The data shows that recently the size of the raccoon population decreased. How will the decrease in the raccoon population affect the other populations? Be sure to explain whether the owl population, the duck population, and the frog population will change, and why.

  1. Owl population will change
  2. Duck population will change
  3. Frog population will change

Solution

Raccoon eat duck and duck eat frog. Now if the population of Raccoon decreases then the number of predators of duck will decrease thereby increasing the population of duck.

The higher will be the number of ducks, the more frogs they will consume thereby decreasing the population of frogs

Hence both the population of duck and frog will change with the change

5 0
3 years ago
A 8 kg cat is running 4 m/s. How much kinetic energy does it have
Debora [2.8K]
<span>KE = 1/2mv^2
KE = 1/2(8)4 m/s^2
KE = 4*4
KE = 16 Joules

Kinetic energy would equal 16 J 
</span>
8 0
3 years ago
The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol. How much energy is produced by burning 0.8210 g
bazaltina [42]

The energy produced by burning : -32.92 kJ

<h3>Further explanation</h3>

Delta H reaction (ΔH) is the amount of heat change between the system and its environment

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)

The enthalpy and heat(energy) can be formulated :

\tt \Delta H=\dfrac{Q}{n}\rightarrow n=mol

The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol.

The energy released for 0.8210 g of naphthalene :

\tt Q=\Delta H\times n\\\\Q=-5139.6~kJ/mol\times \dfrac{0.8210~g}{128.17~g/mol}~\\\\Q=-32.92~kJ

3 0
2 years ago
What do you know about Relative Dating
gizmo_the_mogwai [7]
<span>it tells you the sequence in which events occurred, not how long ago they occurred.</span>
8 0
3 years ago
A 5g piece of aluminum foil (c=0.897) at 100°C is dropped into a 25g container of water (c=4.184) at 20°C. What is the final tem
jeyben [28]

Answer:

23.6°C

Explanation:

use delta h method

5 0
3 years ago
Other questions:
  • At 506 K and 2.05 atm, if 6.00 grams of H2 will reacts with excess N2 what volume in liters will be produced of NH3? (R = 0.0820
    8·1 answer
  • Five different substances are given to you to be dissolved in water. Which substances are most likely to undergo dissolution in
    13·1 answer
  • Consider a mixture of two gases A and B, confined to a closed vessel. A quantity of a third gas, C, is added to the same vessel
    12·1 answer
  • The elements in the periodic table are arranged in order of
    13·1 answer
  • The charges and sizes of the ions in an ionic compound affect the strength of the electrostatic attraction holding that compound
    15·1 answer
  • During your future endeavors in chemistry you will inevitably do a bunch of acid-base problems. Of the strong bases above, calci
    9·1 answer
  • How is atmospheric pressure created​
    12·2 answers
  • Please help me do it dont worry the answers are their just put them in theright place
    8·1 answer
  • What I need help fast!
    13·1 answer
  • What is Li2SO4???????
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!