CHEMISTRY MIDDLE SCHOOL

Determine the hydroxide ion concentration in
a solution that is 0.00043 M Ca(OH)2.

Answers

Answer 1
Answer:

Answer:  Ca(OH)2 = Ca2+ + 2 OH-  

the ratio between Ca(OH)2 and OH- is 1 : 2

Explanation: [OH-]= 2 x 0.00034 = 0.00068 M  

[H+]= Kw/[OH-]= 1.0 x 10^-14 / 0.00068 =1.5 x 10^-11 M ( at two significant figures)  

HCl is a monoprotic acid  

[H+]= 0.00031 M  

[OH-]= Kw/[H+]= 1.0 x 10^-14 / 0.00031 =3.2 x 10^-11 M  

[OH-]= 0.047 M  

[H+]= 1.0 x 10^-14 / 0.047 =2.1 x 10^-13 M

Related Questions

How many protons and electrons are present in Pb2+
The 4 types of chemical reactions
A certain unknown compound burns with a violet flame. What metal is present in the unknown compound? What is the evidence?
How are chemical changes of matter related to the organization of the periodic table
How does the structure of the pencil relate to its function?

How many grams of H20 is formed with 0.75 moles of NaOH

Answers

Answer: 13.5g

Explanation:

Moles = mass/molar mass

Molar mass of water= 18gmol-1

0.75=m/18

m= 17*0.75= 13.5g

A radio changes electricity into _____. sound energy
light energy
mechanical energy
heat

Answers

A radio changes electricity into sound energy.

Which of the following foods is likely lowest in nutritional value and highest in fat?

Answers

Tomato Suop Creamchsee almonds and pears
If i were to guess personally, i'd say the tomato soup, because of the salt content. But i'd look up all of the answers and see personally before answering.It's either that one, or cream cheese, because cheese is very fatty.

What is the Law of Conservation of Mass and Energy? (Explain)

Answers

Answer:

The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Explanation:

Aqueous solution of copper sulphate is acidic . Why?

Answers

Answer:

Explanation:

Aqueous solution of copper sulphate

​is acidic in nature, as when copper sulphate on dissolving with water, following chemical reaction takes place :

CuSO4 + 2 H2O ====> Cu(OH)2 + H2 SO4

​As we can see, copper hydroxide and sulphuric acid is generated in this chemical reaction.Copper hydroxide is a weak base whereas sulphuric acid is a very strong acid which results into increase in acidity of the solution.

Thus, the aqueous solution of copper sulphate is acidic in nature.

The columns of the main transition element start with group.........(2B, 4B, 3B, 5B)

Answers

Yes :) elements in the central block. Groups 4B–8B, 1B, and 2B, or 4–12) in the periodic table, for example, iron, manganese, chromium, and copper :) hope this helps!
Other Questions
I have a balloon that can hold 100 liters of air. If I blow up this balloon with 3 miles of gas at a pressure of 1 atmosphere, what is the temperature of the balloon
What three factors affect the formation of magma
Which of the following is formed at a collision zone?Continental rift valleyVolcanic island chainMountain rangeDeep-ocean trench
Guys, please help me and tell me how you found the answer! If a gas has a pressure of 1.69 atm at a temperature of 300 K, what will the pressure change to if the container is cooled to 100 K? AlsoIf a gas has a pressure of 715 mm Hg at the temperature of 500 K, what will the pressure change to if the container is heated to 900 K?