How many grams of sodium bicarbonate (NaHCO3- MW 84) should be used in preparing 50 mL...

How many grams of sodium bicarbonate (NaHCO3- MW 84) should be used in preparing 50 mL of a solution containing 1 mEq of sodium ion per milliliter?

Please choose from answer below.

2.1 g

4.2 g

8.4g

42 g

94 g

Solutions

Expert Solution

1mEq per ml = 1Eq per liter = 1Normality

volume of solution = 50ml = 0.05L

E.wt of NaHCO3 = M.Wt/total positive charge

= 84/1 = 84 Eq

normality = W/G.E.Wt *volume of solution in L

1 = W/84 * 0.05

W = 84*0.05 = 4.2g

weight of NaHCO3 = 4.2g >>>>answer

queen_honey_blossom answered 2 years ago

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