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Vlad [161]
2 years ago
3

Convert to standard notation. 1.312 x 10^2

Chemistry
2 answers:
arlik [135]2 years ago
7 0

Answer: The answer would be 131.2

Explanation: How I got my answer is quite simple. In order for it to turn into standard notation, it would need to be turned into the answer of an equation. The equation here would be "1.312 x 10^2". 10^2 would be 100. Multiply 100 by 1.312 will make the decimal point move 2 times to the right, so it will end up in front of the 2. That would make the answer 131.2

I hope this info helps! :P

noname [10]2 years ago
6 0
The answer is 131.2 because you move the decimal point two places to the right
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OleMash [197]

Answer:- 0.138 M

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

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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.

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