faith1993 faith1993

27-06-2018
Chemistry

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115mL of a 2.35M potassium fluoride (KF) solution is diluted with 1.28L of water. Why is the new concentration in molarity?

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SvetkaChem SvetkaChem

27-06-2018

M1*V1 = M2*V2

M1 = 2.35 M KF
V1 = 115 mL = 0.115 L

V2 = 0.115 L + 1.28 L = 1.395 L
M2 - ?

M1*V1 = M2*V2
2.35 *0.115 = M2 *1.395
M2 = 2.35 *0.115/1.395 = 0.194 M

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