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
Leviafan [203]
3 years ago
8

Indicate which solution in each pair has the lower pH. Your response should be a four letter "word". The first letter should be

either a or b, the second letter either c or d, and so forth. For example, the word aceg would be used to indicate that the first member of each pair has the lower pH.
a) 0.1 M HClO4 or
b) 0.2 M HClO4
c) 0.1 M NaClO or
d) 0.2 M NaClO
e) 0.1 M HF or
f) 0.1 M HNO2
g) 0.1 M NaOH or
h) pure water
Chemistry
1 answer:
JulijaS [17]3 years ago
7 0

Answer:

bcfh

Explanation:

HClO₄ reacts with water thus:

HClO₄ + H₂O → H₃O⁺ + ClO₄⁻

That means HClO₄ produce H₃O⁺ that decreases pH. That means the higher concentration of HClO₄ decreases pH. Thus, lower pH will be:

b) 0.2 M HClO4

The reaction of NaClO₄ is:

NaClO₄ + H₂O → OH⁻ + HClO₄ + Na⁺

The higher concentration of NaClO₄ the higher production of OH⁻ that increase pH, that means the lower concentration of NaClO₄ the lower pH, thus, the answer is:

<em>c) 0.1 M NaClO or</em>

HF reacts with water thus;

HF ⇄ H⁺ + F⁻

The equilibrium constant is:

k = [H⁺] [F⁻] / [HF] = 3,5x10⁻⁴

For HNO₂ equilibrium is:

HNO₂ ⇄ H⁺ + NO₂⁻

k = [H⁺] [NO₂⁻] / [HNO₂] = 4,5x10⁻⁴

As k value is higher for HNO₂, the concentration of H⁺ will be higher in this system doing the HNO₂ with the lower pH.

f) 0.1 M HNO2

NaOH is a strong base that produce OH⁻ that increase pH, pure water is neutral, thus, the lowe pH is:

h) pure water

I hope it helps!

You might be interested in
What is the net ionic equation for the reaction if any that occurs when aqueous solutions of Na2CO3 and HCL are mixed?
strojnjashka [21]

Answer:

CO₃²⁻(aq)  +  2H⁺(aq) → CO₂ (g)  + H₂O (l)

Explanation:

The balanced reaction between Na2CO3 and HCl is given as;

Na₂CO₃ (aq) + 2 HCl (aq) → 2 NaCl (aq) + CO₂ (g) + H₂O (l)

The next step is o express the species as ions.

The complete ionic equation for the above  reaction would be;

2Na⁺(aq)  + CO₃²⁻(aq)  +  2H⁺(aq)  + 2Cl⁻(aq)   → Na⁺(aq)  + Cl⁻(aq)  + CO₂ (g)  + H₂O (l)

The next step is to cancel out the spectator ion ions; that is the ions that appear in both the reactant and product side unchanged.

The spectator ions are;  Na⁺ and Cl⁻

The net ionic equation is given as;

CO₃²⁻(aq)  +  2H⁺(aq) → CO₂ (g)  + H₂O (l)

7 0
3 years ago
Which statements are true of solutions?
Dimas [21]

Answer: they contain solutes and solvents, their particles must be evenly distributed, they may contain solid liquid and gas simultaneously, and they are homogeneous matter.

Explanation:

4 0
3 years ago
After an organism ingests food, the food moves through a series of _______ by which it is broken down and rearranged to form new
Yakvenalex [24]

Answer:

metabolism

cell division

Explanation:

metabolism is the series of activities that take place in the body of an organism

cell division is the enlargement or division of cell in order for growth to occur

3 0
3 years ago
A particular brand of gasoline has a density of 0.737 g/ml at 25 ∘c. how many grams of this gasoline would fill a 13.0 gal tank
Usimov [2.4K]

Density of gasoline is 0.737 g/mL and volume of tank is 13.0 gal.

Since, 1 US gal=3.78 L

Volume of tank in L will be:

V=13.0 gal(\frac{3.78 L}{1 gal})=49.14 L

Also, 1 L=1000 mL

Thus,

V=49.14 L(\frac{1000 mL}{1 L})=49140 mL

Mass of gasoline can be calculated as follows:

m=d×V

Here, d is density and V is volume thus,

m=0.737 g/mL\times 49140 mL=3.62\times 10^{4}g

Therefore, mass of gasoline will be 3.62\times 10^{4}g.

7 0
3 years ago
Does a physical change make a new substance
sasho [114]

Answer:

no it does not fftyhhhhhhvvvv

6 0
3 years ago
Other questions:
  • What is the wavelength of electromagnetic radiation with a frequency of 9.23 × 10^-7 Hz?
    8·1 answer
  • Complete the balanced equation for the reaction that occurs when formic acid (hcooh) dissolves in water. please include the stat
    9·1 answer
  • Which of the following statements is TRUE? Question 1 options: There is a "heat tax" for every energy transaction. A spontaneous
    15·1 answer
  • What’s the difference between a physical and chemical property
    5·1 answer
  • Cual es el propósito de la línea escalonada gruesa de la tabla periódica
    11·1 answer
  • Which change happens when a fan is turned on?
    5·1 answer
  • What is isotopes and how to write chemical formula​
    11·1 answer
  • If you were a given a beaker containing a clear solution (with no solid solute at the bottom), what simple test would you do to
    12·1 answer
  • If a 22.4 L volume of a sample of gas has a density of 0.900 grams/L at 1.00 atm and 0.00°C. Given
    10·1 answer
  • Of ozone, molecular oxygen, and oxygen radicals, which is the most stable form of oxygen? How do you know?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!