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sesenic [268]
2 years ago
13

What is the pH of a 6.50 x 10-2 M NaOH solution?

Chemistry
1 answer:
dangina [55]2 years ago
7 0

Answer:

12.82

Explanation:

NaOH is a strong base as it contains an alkali metal (Na). When dealing with strong bases, the concentration of OH- is equal to the concentration of the strong base. So, [OH-] = 6.50 x 10^-2.

Using the concentration of OH-, you can find the pOH, by doing -log[OH-]:

-log(6.50 x 10^-2) = 1.187

Now that you have pOH, you can find pH by doing 14 - 1.187, as pH + pOH = 14.

14 - 1.187 = 12.813

The closest answer to this is option D, 12.82.

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scoundrel [369]

Answer:

Moles of water in 7.1×10²⁵ molecules are 118 mol.

Explanation:

Given data:

Number of molecules of water = 7.1×10²⁵ molecules

Moles of water in 7.1×10²⁵ molecules = ?

Solution;

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

1 mole = 6.022 × 10²³ molecules of water

7.1×10²⁵ molecules of water × 1 mol / 6.022 × 10²³ molecules of water

1.18×10² moles of water 0r 118 moles of water

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Chloroform , is a powerful euphoriant , anxiolytic , anesthetic and sedative when inhaled or ingested .

4 0
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Which physical state of matter has the most kinetic energy?
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B.gas would has the most kinetic enegry because its particles move freely
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