5.5 39 N 14 How many grams of salt would be required to make each of the followi

Question

5.5 39 N 14 How many grams of salt would be required to make each of the following solutions? a. b, C. 100 ml of a 10% (w/v) solution 500 ml of a 5% (w/v) solution 50 ml of a 1% (w/v) solution ?CAm of MLOH How many grams of each of the following substances would be required to make 1 liter of a 1M solution? a. NaOH b. H2SO.4 c. CaCl2 How many grams of each of the following substances would be required to make 1 liter of a 1N solution a. HC1 b. Na2sO.4 c. CuSO4 Express the following in terms of molarity: a. 1N NaOH b. 1N H2S04 c. 0.5N AgNO3 d. 2N CaCl2 Express the following in terms of normality: a. 2M HC1 b. 0.1M CuSO c. 1M CaCl2 d. 0.5M H2SO4 . What is the concentration, expressed in percent (w/v), of each of the following solutions? a. 5 g of AgNo3 in 500 ml b. 250 g of KC1 in 1000 ml c. 1 g of CuSO4 in 25 ml d. 2 g of CaCl2 in 10 ml 7. If 40 g of NaOH are diluted to 1 liter, what is the concentration in terms of: a. Molarity b. Normality c. Percent (w/v)

Explanation / Answer

(1)

(a) 100 mL of a 10% (w/v) solution

In this case, we need 10 g of the salt

(b) 500 mL of a 5% (w/v) solution

In this case, we need: (5/100)*500 = 25 g of the salt

(a) 50 mL of a 1% (w/v) solution

In this case, we need: (1/100)*50 = 0.5 g of the salt

(2)

In order to make 1 L of a 1 M solution, we need 1 mole of the salt. So,

(a) NaOH

Mass needed = MW = 40 g

(b) H2SO4

Mass needed = MW = 98 g

(c) CaCl2

Mass needed = MW = 111 g

Hope this helps !

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