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
MA_775_DIABLO [31]
3 years ago
7

Question Determine the concentration of hydroxide ions for a 25 °C solution with a pH of 8.22. . Your answer should contain 2 si

gnificant figures.​
Chemistry
1 answer:
mariarad [96]3 years ago
5 0

Answer:

[OH^-]=1.7x10^{-6}M

Explanation:

Hello!

In this case, since the pOH of a solution can be computed when knowing the pH as shown below:

pH+pOH=14\\\\pOH=14-8.22=5.78

And therefore, the concentration of hydroxide ions based on the definition of pH:

[OH^-]=10^{-pOH}

In such a way, we obtain:

[OH^-]=10^{-5.78}=1.7x10^{-6}M

Best regards

You might be interested in
How do you balance redox equations in acidic solutions?
Anuta_ua [19.1K]

Answer:

First, balance the half-reactions

Second, equalize the electrons

Third,add two reaction equations to get final answer

Explanation:

For example

H₂C₂0₄ + MnO⁻₄ ---------->CO₂+Mn²⁺

(i) Balancing the half reactions

H₂C₂O₄-------->2CO₂+2H⁺+2e⁻

5e⁻ +8H⁺+MnO₄⁻----------->Mn²⁺+4H₂O

(ii)

Equalizing the electrons

5H₂C₂O₄--------->10CO₂+10H⁺+10e⁻  ---here there is a factor of 5

10e⁻+16H⁺+2MnO₄⁻--------->2Mn²⁺+8H₂O -----here there is a factor of 2

(iii)

Add the two where electrons and some Hydrogen ions will cancel out

5H₂C₂O₄+6H⁺+2MnO₄⁻---->10CO₂+2Mn²⁺+8H₂O

7 0
3 years ago
A 0.1025-g sample of copper metal is dissolved in 35 ml of concentrated hno3 to form cu2 ions and then water is added to make a
GalinKa [24]

Molarity is defined as number of moles of solute in 1 L of solution.

Here, 0.1025 g of Cu is reacted with 35 mL of HNO_{3} to produced Cu^{2+} ions.

The balanced reaction will be as follows:

Cu+3HNO_{3}\rightarrow Cu(NO_{3})_{2}+NO_{2}+H_{2}O

From the above reaction, 1 mole of Cu produces 1 mole of Cu^{2+}, convert the mass of Cu into number of moles as follows:

n=\frac{m}{M}

molar mass of Cu is 63.55 g/mol thus,

n=\frac{0.1025 g}{63.55 g/mol}=0.0016 mol

Now, total molarity of solution, after addition of water is 200 mL or 0.2 L can be calculated as follows:

M=\frac{n}{V}=\frac{0.0016 mol}{0.2 L}=0.008 mol/L=0.008 M

Thus, molarity of Cu^{2+} is 0.008 M.



7 0
3 years ago
Acetone is a common solvent that has a density of 0.7899 g/mL. What volume of acetone, in milliliters, has a mass of 35.6 g?
lys-0071 [83]

Answer:

45.069 mL

Explanation:

mass/density=volume.

If we fill in the numbers provided, we would have:

35.6/0.7899=45.069

Don't forget to add your measurements!

45.069 mL

3 0
3 years ago
Is O2 covalent molecular or polar covalent
Dimas [21]
Yes it yes molusbus ks jshs jsbjsus js js sjs js sj dis dis jsys snsus
6 0
3 years ago
Which change of state is shown in the model?
Romashka [77]
I believe the change of state shown in the model is deposition. 
Deposition is a process in which gases change phase and turns directly in solids without passing through the liquid phase. It is the opposite of sublimation.
One of the major difference between gases and solids is the distance between molecules; in gases the inter molecular spaces are large, while in solid they are very small, making solids be the most dense, with closely packed molecules. This is evident in the diagram, the phase changed from gases to solids. 
5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the pressure in a gas container that is connected to an open-end U-tube manometer if the pressure of the atmosphere is 7
    9·1 answer
  • 1. How many millimeters of mercury is 2.64 atmospheres equivalent to?
    5·1 answer
  • How many valence electrons are in an atom of magnesium?
    15·2 answers
  • What is the relationship between time and distance in scientific terms?
    12·1 answer
  • Com relaçao a pilha mg/mg2+//cu2+/cu,indique
    15·1 answer
  • A galvanic (voltaic) cell consists of an electrode composed of aluminum in a 1.0 M aluminum ion solution and another electrode c
    8·1 answer
  • Drive down any three characteristic of modern periodic table​
    15·1 answer
  • Do u have a name or can i call u mine, notice how i put chemistry :) <br><br> jk jk
    12·1 answer
  • if 9.0 grams of water contains 1.0 grams of hydrogen what mass of oxygen is contained in 36 grams of water?​
    11·1 answer
  • A box of paper clips weighs 1.1 kg. If each paper clip weighs 0.88 grams, how many paper clips are in the box? (Hint: 1 kg = 100
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!