More chem help?! what has these properties? There's choices! (but please don't just take a random guess)

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More chem help?! what has these properties? There's choices! (but please don't just take a random guess)

A student tested a 0.1M aqueous solution and made the following observations:
-conducts electricity
-turns blue litmus to red
-reacts with Zn(s) to produce gas bubbles

Which compound could be the solute in the solution?
-CH3OH
-LiBr
-HBr
-LiOH

2007-04-15 13:32:19 · 2 answers · asked by blueskylvr7 1 in Science & Mathematics ➔ Chemistry

2 answers

It's HBr

2007-04-15 13:37:29 · answer #1 · answered by MrZ 6 · 0⤊ 0⤋

Only LiBr, Hbr, and LiOH conduct electricity.
Only HBr turns blue litmus red (it's an acid) (HINT HINT RIGHT ANSWER)
Only HBr reacts with Zn to produce gas bubbles (2HBr + Zn ===> ZnBr2 + H2) But Zn could react with hot concentrated LiOH also. (This doesn't count, because HBr turns litmus red. However, LiOH + Zn ===> Li2Zn(OH)4 + 2H2.

2007-04-15 20:42:11 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋