Working with gases Flashcards
When is a thistle funnel used to prepare a gas?
when using a dilute acid
When is a dropping funnel used when preparing a gas?
when using concentrated acid
How do you prepare carbon dioxide
place calcium carbonate in a flask.
add dilute hydrochloric acid
CaCO_3(s)+2HCl(aq)→CaCl_2(aq)+H_2O(l)+CO_2(g)
How do you prepare hydrogen
put pieces of zinc in a flask
add dilute hydrochloric acid
Zn(s)+2HCl(aq)→ZnCl_2(aq)+H_2(g)
How do you prepare oxygen
add hydrogen peroxide to manganese(VI) oxide
2H_2O_2(aq)→2H_2O(l)+0_2(g)
What method and apparatus is used for gas heavier than air
upward displacement of air
Gas jar
What method and apparatus is used for gas lighter than air
downward displacement of air
gas jar
What method and apparatus is used for gas that is sparingly soluble in water
over water
gas jar in water
what method and apparatus is used when you want to measure accurately
gas syringe
gas syringe
give examples of gas heavier than air
carbon dioxide, sulfur dioxide, hydrogen chloride
give examples of gas lighter than air
ammonia, hydrogen
give examples of a gas sparingly soluble in water
carbon dioxide, hydrogen, oxygen
