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valentina_108 [34]
3 years ago
15

If the ph of a solution is 6.2 what would the poh be

Chemistry
2 answers:
horsena [70]3 years ago
7 0
PH + poH = 14
6.2 +poH = 14
poH = 7.8
Vedmedyk [2.9K]3 years ago
3 0

A. 7.8 (apex)........

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Calculate the maximum wavelength of light that will cause the photoelectric
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Answer:

Explanation:

Work function of potassium = 2.29 eV = 3.67 X 10⁻¹⁹ J

So the minimum energy of photon must be equal to 3.67 X 10⁻¹⁹ J .

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Putting the values in the equation above

6.67  x 10⁻³⁴  x  3 x 10⁸ / λ =  3.67 X 10⁻¹⁹

λ  = 6.67  x 10⁻³⁴  x  3 x 10⁸ /  3.67 X 10⁻¹⁹

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What is the scientific method describes as nonlinear
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A chemist dissolves 699. mg of pure hydrobromic acid in enough water to make up 180. mL of solution. Calculate the pH of the sol
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Answer: 1.32

Explanation:

First, we must obtain the molar mass of HBr. After that, we try to obtain the concentration of the hydrobromic acid from the formula n=CV since the volume of solution and mass of acid was provided. Recall that n=m/M. If the concentration of acid is thus obtained, we make use of the fact that the concentration of H+ in the acid is equal to the molar concentration of HBr to obtain the pH. The pH is the negative logarithm of the concentration we obtained in the initial step.

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