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Zanzabum
3 years ago
12

How did Socrates influence the history of the atom?

Chemistry
1 answer:
aliya0001 [1]3 years ago
4 0

Answer:

Since Socrates didn't leave any written works, we can only learn from his disciple Plato. Plato wrote that Socrates believed in an atomic theory, just not like the one we believe now. We can assume that both Plato and Socrates believed that atoms were geometric forms that were all made up of triangles.

They believed in 4 elements, so we can say that their atomic theory was based on a periodic table made up of:

  • fire (tetrahedron)
  • air (octahedron)
  • water (icosahedron)
  • earth (cube)

I guess that their major influence was that all elements could be broken down into smaller parts or atoms, in this case some type of triangle.

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Answer:

1) pH = 5.05

2) pH = 5.13

3) pH = 4.97

Explanation:

Step 1: Data given

Number of moles of propionic acid = 0.18 moles

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Volume = 1.20 L

Ka = 1.3 * 10^-5    → pKa = 4.989

Step 2: Calculate concentrations

Concentration = moles / volume

[acid]= 0.18/ 1.2 =0.150 M

[salt]= 0.26/ 1.3 = 0.217 M

pH = 4.89 + log(0.217/0.150)=<u>5.05</u>

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What is the pH of the buffer after the addition of 0.02 mol of NaOH?

moles acid = 0.18 - 0.02 = 0.16

[acid]= 0.16/ 1.2=0.133 M

moles salt = 0.26 + 0.02 = 0.28

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pH = 4.89 + log 0.233/ 0.133 = 5.13

What is the pH of the buffer after the addition of 0.02 mol of HI?

moles acid = 0.18+ 0.02 = 0.20 moles

[acid]= 0.20/ 1.2 = 0.167 M

[salt]= 0.26 - 0.02= 0.24 moles

[salt]= 0.24/ 1.2 = 0.20 M

pH = 4.89 + log 0.20/ 0.167= 4.97

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