Measuring rates of reaction
RoR2a
Aim: To measure the rate at which calcium carbonate reacts...
Chemistry, 21.11.2020 15:20 aschool2000
Measuring rates of reaction
RoR2a
Aim: To measure the rate at which calcium carbonate reacts with hydrochloric acid by
measuring the volume of carbon dioxide produced at intervals during the reaction.
Experimental arrangement
measuring
cylinder
delivery tube
SAFETY:
Wear safety glasses
Wash any spillages with plenty
of water
gas
conical
flask
hydrochloric
adid
water
calcium carbonate
Method
1. Measure out 25 cm3 of 0.4M hydrochloric acid using a measuring cylinder and pour it into
a small conical flask.
2. Arrange the water trough and the inverted 100cmº measuring cylinder full of water ready
llatba
start stond bocsandalam
Answers: 2
Chemistry, 21.06.2019 22:30, stefaniethibodeaux
Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial
Answers: 1
Chemistry, 21.06.2019 23:30, ashleyjaslin
Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.
Answers: 2
Chemistry, 22.06.2019 02:30, bionicboy03120440
What is the mass of sodium in 3 moles of sodium chloride
Answers: 1