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RideAnS [48]
3 years ago
11

Please answer fast and correct. (15 points)

Chemistry
2 answers:
denis23 [38]3 years ago
6 0

Answer:

the frequency with get lower

nikitadnepr [17]3 years ago
3 0

Answer:

its gets lower

Explanation:

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A student is performing a titration to determine the concentration of a 20.0 mL sample of hydrochloric acid. What did the studen
irakobra [83]

Answer:

0.25M HCl

Explanation:

The reaction of HCl with NaOH is:

HCl + NaOH ⇄ H₂O + NaCl

<em>Where 1 mole of HCl reacts per mole of NaOH</em>

The end point was reached when the student added:

0.0500L × (0.1mol / L) = 0.00500 moles of NaOH

As 1 mole of HCl reacted per mole of NaOH, moles of HCl present are:

<em>0.00500 moles HCl</em>

The volume of the sample of hydrochloric acid was 20.0mL = 0.0200L, and concentration of the sample is:

0.00500 mol HCl / 0.0200L = <em>0.25M HCl</em>

8 0
3 years ago
A 50.0 mL solution of 0.133 M KOH is titrated with 0.266 M HCl . Calculate the pH of the solution after the addition of each of
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3 years ago
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kondaur [170]

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Which element is smaller is atomic size?
Ganezh [65]

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Scandium is the smallest element of the four

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