CHEMISTRY MIDDLE SCHOOL

What is the pOH of a 0.00037 M solution of barium hydroxide

Answers

Answer 1
Answer:

Answer: pOH = 3.13

Ba(OH)2 is a very basic substance. The general formula for pOH is - log(OH)

Barium Hydroxide produces 2 moles of OH for every mole of Ba(OH)2 present in the solution.


0.00037 M = 3.7 * 10^-4 Ba(OH)2 will produce 2 *0.00037 M of OH-

OH- = 2* 0.00037 = 0.00074

pOH = - log(0.00074) = 3.13


Answer 2
Answer:

Answer:

3.13

Explanation:


Related Questions

HIGH SCHOOL

A gas is contained in a 5.0–liter container at a pressure of 100 kPa. What size container would be required to contain the gas at a pressure of 50 kPa, assuming the temperature remains constant?

Answers

Answer : The volume of gas is, 10 L

Explanation:

According top the Boyle's Law, the pressure of a gas is inversely proportional to the volume of the gas.

or,

where,

= initial volume of gas = 5 L

= final volume of gas = ?

= initial pressure of gas = 100 kPa

= final pressure of gas = 50 kPa

Now put all the given values in the above formula, we get the final volume of the gas.

Therefore, the volume of gas is, 10 L

P1* V1 = P2 * V2

100* 5 =  50 * V2

500 = 50 V2

V2 = 500 / 50

V2 = 10.0 L

hope this helps!

MIDDLE SCHOOL

The number of blank always differs in atoms of different elements

Answers

Answer:

Protons

Explanation:

The periodic table is arranged in order of atomic number, which is # of protons. This is because each element has it's own distinct # of protons, there will always be 8 protons in oxygen, and carbon will never have 8 protons.

Protons


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MIDDLE SCHOOL

A hot meal plate at 150 has been placed in air at room temperature. Which event would most likely take place over the next few minutes

Answers

The hot plate would eventually cool down because the heat inside the meal plate would be transfering to the oxygen in the air therefore making the hot plate cool. The same thing happens with food and it is why objects have to have a constant source of heat.

HIGH SCHOOL

Which is an example of a covalent bond? Chlorine accepts an electron from calcium to form a stable bond. Ions in a bar of pure iron are surrounded by a large number of valence electrons. There are less than 16 valence electrons in 2 chlorine atoms, but they form a stable bond.

Answers

Answer:

There are less than 16 valence electrons in 2 chlorine atoms, but they form a stable bond

Explanation:

A covalent bond occurs between nonmetal elements, or between a nonmetal and hydrogen or between hydrogen atoms. In this kind of bond, the atoms share electrons.

In the first case, chlorine is accepting electrons from calcium, which is donating. Chlorine is a nonmetal, but calcium is a metal. They form an ionic bond.

In a metal bar, like iron, there are metallic bonds: the metal loses electrons, and the cation (the metal ion) is surrounded by these electrons.

So, in a bond between two chlorine atoms, both nonmetal, there is a sharing of electrons. Both have 7 electrons in the valence shell, and each one shares one electron. They both will have 8 electrons, but the total will be 14 electrons, less than 16.

Chlorine + Calcium --> Ionic Bond
Iron cannot covalently bond as it is a metal
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