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chemistry problem: acetylene derivative?
1. Of the two general types of acetylene derivatives, R-C=C-H and R-C=C-R which would be expected to give a positive test when the reagents Ammoniacal Cuprous Chloride and Ammoniacal Silver nitrate are used?
b. What structural effect or feature is required for the reaction?
c. What is the function of ammonia in these reactions?
2. (Just verifying) What volume of acetylene measured at standard conditions could be obtained from 10 grams of calcium carbide?
*I got the answer 3.8690L... I used .1560mol for n... I'm not sure if I was on the right track xD
thanks :D
1 Answer
- ?Lv 79 years agoFavorite Answer
1. You say this problem is about acetylene derivative .. but the compounds you give only have double, not triple bonds between the C atoms. Is that correct?
2. CaC2 (s)+2H2O(l)=> C2H2(g) + Ca(OH)2 (aq)
molar mass CaC2 = = 40 + (12x2) = 64
64g CaC2 gives 22.4L C2H2 [1 mole] at STP
Use simple proportion
10g CaC2 gives 22.4/64 x 10 = 3.5L C2H2
unfortunately you haven't posted your method here so can't see what you did wrong. even if you use room temp [1 mole gas = 24L] you only get 3.75L not 3.869L although no of mole is 0.15625 .. similar to your figure.
Source(s): rtc
