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WINSTONCH [101]
3 years ago
10

In what way are chemicals a part of our everyday lives

Chemistry
2 answers:
dsp733 years ago
8 0

Answer:

Everywhere

Explanation:

Chemicals are a significant part of our lives.

We use it in our cloths (as the dyeing), for cooking (as salt and the fire we use), to clean our houses (as detergents, disinfectant), to our hygiene (as deodorants, toothpaste, soap).

But chemicals move our bodies, as the breathing process and all the other biological process we need to live.

vazorg [7]3 years ago
3 0
There are chemicals in lots of things we use every day such as mouthwash, toothpaste, and soap.
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Which is a chemical property of copper?
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3 years ago
Suppose you wanted to make a buffer of exactly ph 7.00 using kh2po4 and na2hpo4. if the final solution was 0.10 m in kh2po4, wha
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Answer:- 0.138 M

Solution:- The buffer pH is calculated using Handerson equation:

pH=pKa+log(\frac{base}{acid})

KH_2PO_4 acts as a weak acid and Na_2HPO_4 as a base which is pretty conjugate base of the weak acid we have.

The acid hase two protons(hydrogen) where as the base has only one proton. So, we could write the equation as:

H_2PO_4^-\rightleftharpoons H^++HPO_4^-^2

Phosphoric acid gives protons in three steps. So, the above equation is the second step as the acid has only two protons and the base has one proton.

So, we will use the second pKa value. The acid concentration is given as 0.10 M and we are asked to calculate the concentration of the base to make a buffer of exactly pH 7.00.

Let's plug in the values in the equation:

7.00=6.86+log(\frac{base}{0.10})

7.00-6.86=log(\frac{base}{0.10})

0.14=log(\frac{base}{0.10})

Taking antilog:

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On cross multiply:

[base] = 1.38(0.10)

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So, the concentration of the base that is Na_2HPO_4 required to make the buffer is 0.138M.

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