Question

1. Calculate the following: How do you prepare 75 mL of 2% ferric chloride from a 10% solution? If you only have ferric chloride crystals, how much do you need? mL H20 mL 8 Esch How many mL of an 11% solution will 300 g of sodium chloride make? 8.25 mL hydrochloric acid diluted to 450 mL is what percent solution? 13.5 g of potassium dichromate will make how many mL of a 5% solution? How many g of EDTA disodium salt will be needed to make a 3% solution to fill a 3-gallon carboy?

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Answer 1

Y; v: 15 ML 15 mL H₂O (AN) In 100 mL, felly present ag yn 75 ML, " 217559 100 solute present in 2. 11g : 300 9 100 ml 100 300 ML : 2924.3 mL Any) 3. In uso mL, HU present : in 100 mL, " " 8.25 ml 8.25 x 100 mL = 1.83 mL 450 : 1.83 %. (Aus) 4. is present in 5 g :13:59 100 ml 60 x 13.5 ML 270 ML . (A 5. a 3785 mL I gallon = 3.785 l 100 In 100 mL, g present 3 g :. In 3785 me, " " 343765 g = 16.25 g (Any) Hope it helps.