Ethyne Flashcards
Balanced eq for production of ethyne in lab
Cac(2) + 2h(2)o = ca(oh)(2) + c(2)h(2)
Describe appearance of calcium dicarbide
Grey lumpy solid
What does the reaction feel like towards the end of ex and why
Hot as reaction is exothermic
How is ethene collected explain why
Over water as ethyne is non polar and water is polar
Describe what u see when ethyne burns
Yellow/ smoky flame
How would u demonstrate that ethyne is unapsaturated
Shake with bromine water goes red / brown to colourless
Describe the apperance and smell of ethyne
Colourless gas and sickly sweet smell
Chemical eq for combustion of ethyne
C(2)h(2) + 2and a half o (2)=2co(2) + h(2)o
Ethyne is passed through a blue liquid what is it and what is it’s purpose
Acidified copper (2) sulphate solution / remove impurities
Name an impurity often found in ethyne and the substance that produces it
Phosphine/ calcium phosphide
Name and describe the substance left in reaction vessel at the end of the experiment
Calcium hydroxide / white/ powder/ with bigger volume
Give another name for ethyne and a common use for it
Actelyne/ oxyacetylene burner / for cutting wielding steel
What does unsaturated hydrocarbon mean
Unsaturated = contains at least one c to c double or triple bond Hydrocarbons= consist of hydrogen and carbon only
Labels on diagram
A is water
B is calcium dicarbide
C is ethyne
D is water
