Calculate the final concentration of each of the following: Water is added to 0.

Question

Calculate the final concentration of each of the following: Water is added to 0.30 L of a 14 M NaOH solution to make 4.0 L of a diluted NaOH solution. Express your answer using two significant figures. A 13.0 -mL sample of a 24 % (m/v) KOH solution is diluted with water so that the final volume is 150.0 mL. Express your answer using two significant figures. A 69.0 -mL sample of a 18 % (m/v) H_2SO_4 solution is added to water to give a final volume of 330 mL. Express your answer using two significant figures.

Explanation / Answer

Part B :-

M1V1 = M2V2

14M*0.30L = M2*4L

M2 = 14M*0.39L/4L

Cfinal = 1.36M

Part C :-

Cinitial*Vinitial = Cfinal*Vfinal

24%(m/v)*130ml = Cfinal*150ml

Cfinal = 24%(m/v) *130ml/150ml

= 20.8%(m/v)

Part D.

Cinitial * Vinitial = Cfinal*Vfinal

18%(m/v) * 69ml = Cfinal * 330ml

Cfinal = 18%(m/v)*69ml/330ml

= 3.75%(m/v)

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