PartA 1.9 L of a 2.50 MHNOs solution is added to water so that the final volume

Question

PartA 1.9 L of a 2.50 MHNOs solution is added to water so that the final volume is 6.5 L Express your answer to two significant figures and include the appropriate units. alue Units Submit Part B Water is added to 0.60 L of a 8.0 M NaF solution to make 2.5 L of a diluted NaF solution Express your answer to two significant figures and include the appropriate units. Value Units Submit ? Part C A 540 mL sample of an 4 5 % (m/v) KBr solution is diluted with water so that the final volume is 241.5 ml Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

we have the formula,

M1V1 = M2V2

M1,V1 are the initial values of the solution

M2,V2 are the final values of the solution

2.5 * 1.9 = M2 * 6.5

M2 = 0.73 M

M1V1 = M2V2

M1,V1 are the initial values of the solution

M2,V2 are the final values of the solution

8 * 0.6 = M2 * 2.5

M2 = 1.92 M

molarity of the solution = 4.5/119*1000/100

molarity = 0.378 M

M1V1 = M2V2

M1,V1 are the initial values of the solution

M2,V2 are the final values of the solution

0.378 * 54 = M2 * 241.5

M2 = 0.0845 M

molarity of the solution = 40.5/60*1000/100

molarity = 6.75 M = 6.7 M ( for two significants)

M1V1 = M2V2

M1,V1 are the initial values of the solution

M2,V2 are the final values of the solution

6.75 * 5.5 = M2 * 32

M2 = 1.16 M = 1.2M (for two significant figures)

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