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bogdanovich [222]
2 years ago
9

A student uses a sample of KOH stock solution and dilutes it to a total of 120 mL. If the diluted solution is 0.60 M KOH and its

original concentration was 2.25 M, what was the volume of the original sample? *
1.4 mL

89 mL

32 mL

5.5 mL

(DON'T POST LINKS PLEASE)
Chemistry
1 answer:
Vesnalui [34]2 years ago
5 0

Answer:

5.5

Explanation:

i think so?????????

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<u>Step 1:</u> Data given

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<u>Step 2:</u> Calculate the number of moles

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⇒ with V = the volume = Assume this is 1L

⇒ with n = the number of moles = TO BE DETERMINED

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<u>Step 4:</u> Calculate moles of F

Moles = Mass / molar mass

Moles F = 70.4 g / 19 g/mol

Moles F =  3.70 moles

Moles S = 29.6g / 32.07 g/mol

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<u>Step 5:</u> Divide by the smallest amount of moles

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