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
IgorC [24]
3 years ago
14

Which of the following solutions would have the most basic pH? Assume that they are all 0.10 M in acid at 25C. The acid is follo

wed by its Ka value. Group of answer choices HClO2, 1.1 × 10-2 HCHO2, 1.8 × 10-4 HCN, 4.9 × 10-10 HNO2, 4.6 × 10-4 HF, 3.5 × 10-4
Chemistry
1 answer:
pychu [463]3 years ago
5 0

Answer:

Explanation:

Given:

Ka of HClO2 = 1.1 × 10-2

Ka of HCHO2 = 1.8 × 10-4

Ka of HCN = 4.9 × 10-10

Ka of HNO2 = 4.6 × 10-4

Ka of HF = 3.5 × 10-4

All at a concentration of 0.1 M

A.

HA --> H+ + A-

Ka = [H+] × [A-]/[HA]

[H+] = [A-] = x

[HClO2] = 0.1 M

HClO2 --> ClO2^- + H+

1.1 × 10-2 = x^2/0.1

x = sqrt(1.1 × 10^-3

= 0.033 M

pH = -log[H+]

= 1.48

B.

HA --> H+ + A-

Ka = [H+] × [A-]/[HA]

[H+] = [A-] = x

[HCHO2] = 0.1 M

HCHO2 --> CHO2^- + H+

1.8 × 10-4 = x^2/0.1

x = sqrt(1.8 × 10^-5)

= 0.0042 M

pH = -log[H+]

= 2.37

C.

HA --> H+ + A-

Ka = [H+] × [A-]/[HA]

[H+] = [A-] = x

[HCN] = 0.1 M

HCN --> CN- + H+

4.9 × 10-10 = x^2/0.1

x = sqrt(4.9 × 10-11)

= 0.000007 M

pH = -log[H+]

= 5.16

D.

HA --> H+ + A-

Ka = [H+] × [A-]/[HA]

[H+] = [A-] = x

[HNO2] = 0.1 M

HNO2 --> NO2^- + H+

4.6 × 10-4 = x^2/0.1

x = sqrt(4.6 × 10-5)

= 0.0068 M

pH = -log[H+]

= 2.17

E.

HA --> H+ + A-

Ka = [H+] × [A-]/[HA]

[H+] = [A-] = x

[HF] = 0.1 M

HF --> F- + H+

3.5 × 10-4 = x^2/0.1

x = sqrt(3.5 × 10-5)

= 0.0059 M

pH = -log[H+]

= 2.23

a) pH = 1.48

b) pH = 2.37

c) pH = 5.16

d) pH = 2.17

e) pH = 2.33

HCN is most basic because;

smallest Ka

Highest pH value = 5.16

You might be interested in
I need help with this question I don’t understand it at all!!!
bezimeni [28]

Answer:

C-14 => N-14 + β⁻

Explanation:

C-14 over time decays by beta emission to N-14. Before decay, C-14 nucleus contains 6 protons and 8 neutrons. It is accepted that a neutron (n°) is composed of 1 proton (p⁺) and 1 electron (e⁻). Beta emission indicates loss/discharge of a high energy e⁻ from the nucleus of C-14 leaving 7 protons and 7 neutrons. The number of protons defines the element, N-14 as a product of the decay process with the β particle (high energy electron) the other. To check, remember, the ∑mass Reactants = ∑mass Products (superscript numbers) and ∑reactant charges = ∑product charges (subscript numbers

₆C¹⁴ => ₇N¹⁴ + ₋₁e°  or, C-14 => N-14 + β

4 0
3 years ago
Ok I'm playing minecraft I have 30 levels and a full enchantment room, what's better using thirty levels on a diamond axe of a d
laila [671]

Answer:

diamond axe

Explanation:

??

3 0
3 years ago
Read 2 more answers
What type of flower is this? This is for a science project.
kenny6666 [7]

I believe that is a plant called Wisteria.

4 0
3 years ago
Read 2 more answers
An object weighing 90 n has a volume of 45 ml and a mass of 9.0 g what is its density
UNO [17]
D= mass over volume

So, density equals 9.0g divided by 45ml.

SO, D=.25 g/ml

I'm not 100% sure this is correct, though. Best if luck. ♡
7 0
4 years ago
Koby decides to change the amount of vinegar. He will keep the amount of baking soda constant at ½ teaspoon. He will run three t
Wittaler [7]

Answer: When baking soda and vinegar are combined, a new substance is produced. The carbon dioxide gas soon foams up in the mixture. Carbon dioxide, water, and sodium acetate are generated when sodium bicarbonate and acetic acid react.As Kobe adds additional baking soda and vinegar, the reaction will also become stronger.

Explanation: <em>well to be completely honest I don't see any answer choices so I'm going to assume that this is a writing question</em>

5 0
3 years ago
Other questions:
  • During respiration _____.
    10·2 answers
  • Burning magnesium gives us magnesium oxide. This is an example of a _____ reaction. ______ is the common element involved with a
    7·2 answers
  • PLEASE HELP WITH EASY 8th GRADE SCIENCE!!
    14·2 answers
  • Can selicone conduct electricity and heat
    13·2 answers
  • How many mole are contained in 3.131x1024 particles?
    7·1 answer
  • Why are constellations and predictable locations in the night sky but planets are hard to find
    15·1 answer
  • Kaitlyn said that the metal sodium Na and the non metal neon Ne form the ionic compound NaNe. Using what you know about groups a
    12·1 answer
  • Are all forms of energy as useful to us or can we only use certain forms at home, in our cars, or computers?
    6·1 answer
  • How does an electron emit light?
    11·1 answer
  • What is the volume of a solution that has a specific gravity of 1. 2 and a mass of 185g.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!