IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Sciences => Topic started by: NotAbod on March 16, 2011, 08:29:40 pm

Title: chemistry problem
Post by: NotAbod on March 16, 2011, 08:29:40 pm

hello
what is suck back?
is there any effects to the apparatus if it occurs?
a similar question is in 2010 winter paper 6, question 1
help please my chemistry mock exam is tommorow
time is 11:30 pm try to help pl0x

Title: Re: chemistry problem
Post by: Amii on March 16, 2011, 09:44:31 pm

Suck back would basically mean the back flow of a substance.

In that experiment gas is collected over water. If heating is stopped before the delivery tube is removed from the water -the water will rise up the delivery tube as the pressure in the reaction tube decreases(since it cools).The water can flow back/can be sucked back into the hot boiling tube causing it to crack - an explosion might occur.

Hope this helps

Take care and good luck  :D

Title: Re: chemistry problem
Post by: NotAbod on March 16, 2011, 09:50:55 pm

very helpful
thanks for the fast reply :)

Title: Re: chemistry problem
Post by: Amii on March 16, 2011, 09:52:54 pm

Quote from: Abod on March 16, 2011, 09:50:55 pm

very helpful
thanks for the fast reply :)

No problem  :D