Question

In: Chemistry

1) Determine the molarity of 4.00 ml of 2 x 10-2 Molar KSCN diluted to 15...

¹⁾ Determine the molarity of 4.00 ml of 2 x 10^-2 Molar KSCN diluted to 15 ml with water. Determine the ppm for 5.45 x 10^-5 Molar Cu⁺² .

Expert Solution

1)

Molarity of KSCN = 2 x 10^-2 M

volume = 4.00 mL

diluted volume = 15 mL

C1 V1 = C2 V2

2 x 10^-2 x 4 = C2 x 15

C2 = 5.3 x 10^-3 M

Molarity of KSCN = 5.3 x 10^-3 M

b)

5.45 x 10^-5 M Cu+2

ppm = mg / L

5.45 x 10^-5 M = 5.45 x 10^-5 mol / L

= 5.45 x 10^-5 mol / L x 63.5 g/mol

= 3.46 x 10^-3 g / L

= 3.46 mg / L

= 3.46 ppm

queen_honey_blossom answered 2 years ago

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