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stanfordream · 04-13-2006, 07:45 PM

This was posted on another thread by Evilbooya:
"you have solutions of AgNO3, Na2CO3, NaCl, and H2S in solutions of W,X,Y,and Z. using only test tubes and graduated cylinders, explain how you would determine which solution is what (no Ph paper allowed)"

Solution:
1. Add HCl: AgNO3 + HCl will form precipitate (AgCl); Na2CO3 will produce CO2 gas
2. i'm not sure about H2S, but i think maybe if you add NaOH, you'll get SO2 gas.
3. the one remaining must be NaCl

Edit: to the above question. (A) CO2 22g/.5mol=44g/mol

Why is water the most dense at 4 degrees C? (compared to its density at other temperatures)

04-13-2006, 07:45 PM	#3
stanfordream Junior Member Join Date: Dec 2005 Threads: 21 Posts: 142	This was posted on another thread by Evilbooya: "you have solutions of AgNO3, Na2CO3, NaCl, and H2S in solutions of W,X,Y,and Z. using only test tubes and graduated cylinders, explain how you would determine which solution is what (no Ph paper allowed)" Solution: 1. Add HCl: AgNO3 + HCl will form precipitate (AgCl); Na2CO3 will produce CO2 gas 2. i'm not sure about H2S, but i think maybe if you add NaOH, you'll get SO2 gas. 3. the one remaining must be NaCl Edit: to the above question. (A) CO2 22g/.5mol=44g/mol Why is water the most dense at 4 degrees C? (compared to its density at other temperatures)