
Experimental techniques (p2)
Quiz
•
Chemistry
•
8th Grade - University
•
Practice Problem
•
Medium
Ngan Do
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10 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
A student investigates how the concentration of an acid affects the speed of reaction with a 0,5g mass of magnesium at 30oC.
The student has a beaker, concentrated acid, water and the apparatus below.
Which pieces of apparatus does the student use?
a balance
a clock
a measuring cylinder
a thermometer
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student was provided with only a thermometer, a stopwatch and a beaker.
What could the student measure?
10.5g solid and 24.8cm3 liquid
10.5g solid and 25oC
24.8cm3 liquid and 45 seconds
25oC and 45 seconds
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student carries out an experiment to find how fast 3 cm pieces of magnesium ribbon dissolve in 10 cm3 samples of sulfuric acid at different temperatures?
What piece of apparatus does the student not need?
balance
measuring cylinder
stop-clock
thermometer
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
A student takes 2 g samples of calcium carbonate and adds them to 20 cm3 samples of dilute hydrochloric acid at different temperatures. She measures how long it takes for the effervescence (sủi bọt) to stop.
Which apparatus does she use?
balance
clock
filter funnel
measuring cylinder
thermometer
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
P, Q, R and S are pieces of apparatus.
Which row describes the correct apparatus for the measurement made?
P: the volume of acid added to alkali in a titration
Q: 1cm3 of acid to add to calcium carbonate in a rate-determining experiment
75 cm3 of a gas given off in a rate - determining experiment
20 cm3 of alkali for use in a titration
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
During a reaction, the following changes take place.
- The temperature rises.
- A gas is given off.
Which apparatus is required to measure the rate of this reaction?
balance and burette
balance and gas syringe
gas syringe and burette
gas syringe and stop-clock
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A mixture of ethanol and methanol are separated by fractional distillation. This method of separation depends on a difference in property X of these two alcohols.
What is property X?
boiling point
colour
melting point
solubility
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