Select 5 that apply. What are the proper techniques for decanting a liquid?
A. Keep the test tubes away from your eyes.
B. Pour slowly to prevent the precipitate from being
disturbed or transferred.
C. If decanting with beakers, use a glass stirring rod to prevent the liquid from splashing or
running down the side of the beaker.
D. Touch the lips of the tubes together.
E. Keep the tubes separate.
F. Pour quickly to prevent the precipitate from being disturbed or transferred.
G. Bring the test tubes to eye level so you can watch closely as you pour the liquid.
H. If decanting with test tubes, extend your arms so that the tubes are at arms' length.
I. If decanting with test tubes, keep your elbows tucked into your side.
Answers: 1
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Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in cl−. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42−. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback
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Select 5 that apply. What are the proper techniques for decanting a liquid?
A. Keep the test tubes...
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