mass ne a led li How many grams of each of the following substances would be req

Question

mass ne a led li How many grams of each of the following substances would be required to make 1 liter solution? 3. of a 1N a. HC1 b. Na S0 c. CuS0 4. Express the following in terms of molarity a. 1N NaOH b. 1N H2SO4 c. 0.5N AgNO d. 2N CaCl2 5. Express the following in terms of normality a. 2M HC1 b. 0.1M CuSOa c. 1M CaCl2 d. 0.5M H2SO4 6. What is the conce ntration, 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. 1g 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

(6)

(a)

% composition = (5/500)*100 = 1%

(b)

% composition = (250/1000)*100 = 25%

(c)

% composition = (1/25)*100 = 4%

(d)

% composition = (2/10)*100 = 20%

(7)

Moles of NaOH = Mass/MW = 40/40 = 1

So,

Molarity = Moles/Volume = 1/1 = 1 M

Normality = Molarity*1 = 1 N

Percent (w/v) = (40/1000)*100 = 4%

Hope this helps !

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