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
Fofino [41]
3 years ago
8

What is the pOH of a 0.0072 M solution of sodium hydroxide? pOH=?

Chemistry
2 answers:
Rus_ich [418]3 years ago
8 0
POH of a 0.0072 M=-lg(0.0072) = 2.1426675
saw5 [17]3 years ago
4 0

Answer : 2.14

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

Given : NaOH\rightarrow Na^++OH^-

1 mole of NaOH gives 1 mole of OH^_

Thus 0.0072 moles of  NaOH will give= 0.0072 moles of OH^_

pOH=-\log [OH^]

pOH=-\log (0.0072)

pOH=2.14

Therefore, the pOH of the basic solution is 2.14.

You might be interested in
What volume of concentrated nitric acid (15.0M) is requiredfor
seraphim [82]

Answer:

0.133 mL

Explanation:

Given data

  • Initial concentration (C₁): 15.0 M
  • Initial volume (V₁): to be determined
  • Final concentration (C₂): 0.001 M
  • Final volume (V₂): 2.00 L

We can find the volume of the concentrated solution using the dilution rule.

C₁ × V₁ = C₂ × V₂

V₁ = C₂ × V₂ / C₁

V₁ = 0.001 M × 2.00 L / 15.0 M

V₁ = 1.33 × 10⁻⁴ L = 0.133 mL

5 0
3 years ago
In a physical change, the _____ does not change.
Ksivusya [100]

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.

7 0
3 years ago
Help help help !!!!!!
11111nata11111 [884]

Answer:

3. 116.5 V

4. 119.6 V

Explanation:

3. Determination of the voltage.

Resistance (R) = 25 Ω

Current (I) = 4.66 A

Voltage (V) =?

V = IR

V = 4.66 × 25

V = 116.5 V

Thus, the voltage is 116.5 V

4. Determination of the voltage.

Current (I) = 9.80 A

Resistance (R) = 12.2 Ω

Voltage (V) =?

V = IR

V = 9.80 × 12.2

V = 119.6 V

Thus, the voltage is 119.6 V

4 0
3 years ago
An atom of oxygen (atomic number 8) has a mass number of 17. How many neutrons are<br> in that atom?
ludmilkaskok [199]
<h2>Answer:  # of neutrons = 9</h2>

<h3>Explanation:</h3>

# of neutrons = mass number - atomic number

                      = 17 - 8

                      = 9

<h3>∴ number of neutrons in an atom of oxygen of mass number 17, is 9.</h3>
3 0
2 years ago
Given the following thermodynamic data, calculate the lattice energy of LiCl:
tiny-mole [99]

Answer:

\boxed{\text{-862 kJ/mol}}

Explanation:

One way to calculate the lattice energy is to use Hess's Law.

The lattice energy U is the energy released when the gaseous ions combine to form a solid ionic crystal:

Li⁺(g) + Cl⁻(g) ⟶ LiCl(s); U = ?

We must generate this reaction rom the equations given.

(1)  Li(s) + ½Cl₂ (g) ⟶ LiCl(s);      ΔHf°     = -409 kJ·mol⁻¹

(2) Li(s) ⟶ Li(g);                          ΔHsub =    161 kJ·mol⁻¹

(3) Cl₂(g) ⟶ 2Cl(g)                     BE        =   243 kJ·mol⁻¹

(4) Li(g) ⟶Li⁺(g) +e⁻                   IE₁         =   520 kJ·mol⁻¹

(5) Cl(g) + e⁻ ⟶ Cl⁻(g)                EA₁       =  -349 kJ·mol⁻¹

Now, we put these equations together to get the lattice energy.

                                                <u>E/kJ </u> 

(5) Li⁺(g) +e⁻ ⟶ Li(g)                520

(6) Li(g) ⟶ Li(s)                         -161

(7) Li(s) + ½Cl₂(g) ⟶ LiCl(s)     -409

(8) Cl(g) ⟶ ½Cl₂(g)                   -121.5

(9) Cl⁻(g) ⟶ Cl(g) + e⁻               <u>+349</u>

      Li⁺(g) +  Cl⁻(g) ⟶ LiCl(s)     -862

The lattice energy of LiCl is \boxed{\textbf{-862 kJ/mol}}.

3 0
3 years ago
Other questions:
  • Which ion has the largest radius?<br>1) Br-<br>2) Cl-<br>3) F-<br>4) I-​
    12·1 answer
  • There are two jars A and B containing food materials. Food in jar 'A' is picked with acetic acid while 'B' is not. food of which
    7·1 answer
  • A 7.11g sample of potassium chlorate was decomposed according to the following equation: 2KCLO3 --&gt;2KCL + 3O2 How many moles
    9·1 answer
  • There are exaclty 640 acres in one square mile. How many square meters are in 2.2 acres?
    8·1 answer
  • The rate of reaction (reaction rate) is the
    5·1 answer
  • How long does it take for 87.5 % of each isotope to decay?
    14·1 answer
  • What are rules of brainly?
    12·2 answers
  • Bicarbonate is a solution present in human blood. Bicarbonate helps to maintain our bodies pH and resists pH change. Bicarbonate
    10·2 answers
  • The graph below shows how the temperature and volume of a gas vary when
    6·1 answer
  • What frequency corresponds to an absorption line at 460 nm?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!