JoeMK Posted June 29, 2005 Posted June 29, 2005 Ok, we got this other question Use the following information to design the experiment and so complete the questions applicable to it a. u are given a substance that you know is a soluble chloride (to be refered to as X.Cl.) b. X is a group 1 cation Perform a first hand investigation to measure and identify the mass ratios of metal to non metals in a compund and calculate the empirical formula Anyone got an idea to a procedure? ... i hope i ain't asking to much, thanks
gnpatterson Posted June 29, 2005 Posted June 29, 2005 what sort of chemistry have you been doing recently? that should provide a clue. you are probably looking for an insoluble product containing chloride ions dont worry if you dont get a gold medal, second place will do.
JoeMK Posted June 29, 2005 Author Posted June 29, 2005 this is for high school chemistry, we have just finished studying the moles would u think electrolysis would be a good idea, as chlorides are soluble in water?
gnpatterson Posted June 30, 2005 Posted June 30, 2005 no i have been slightly crpytic in the reply silver nitrate is the answer
YT2095 Posted June 30, 2005 Posted June 30, 2005 well if it`s a chloride of a group 1 metal then the ratio will be 1:1 you know that chlorine has a mass of 35.5 per mole, a little simple maths using the volume and weight of the mystery sample will give a remainder, if it`s 7 it`s Li, 11 it`s Na, 19 it`s K, 37 it`s Rb and so on down the list. failing that do a flame test and identify the color (but that`s cheating)
JoeMK Posted June 30, 2005 Author Posted June 30, 2005 no i have been slightly crpytic in the reply silver nitrate is the answer u serious? How can u i already handed my assignment up..i used electrolysis
YT2095 Posted June 30, 2005 Posted June 30, 2005 I think he`s eluding to the fact that silver nitrate will create a near isoluble precipitate of silver chloride when in contact with. it`s commonly used as a detection method for Chlorine ions as the white precipitate is quite unmistakable, how he`s going to apply it to your question I`m waiting to learn also. since the Chloride part wasn`t a mystery and was stated quite clearly as containing X.Cl. maybe he`s thinking about weighing the silver chloride and then subtracting that from the remaining X.Nitrate?
ybk Posted June 30, 2005 Posted June 30, 2005 ahhh... electrolysis > other crappy silver nitrate thingy cause electrolysis is used in industry to actually seperate chloride.
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