Question 1:
List out three safety steps while in the laboratory.
Answer:
– Do not play in the laboratory.
– Wear protective equipment when carrying out experiments.
– Do not bring food or drinks into the laboratory.
(any other acceptable answers).
List out three safety steps while in the laboratory.
Answer:
– Do not play in the laboratory.
– Wear protective equipment when carrying out experiments.
– Do not bring food or drinks into the laboratory.
(any other acceptable answers).
Question 2:
Give the functions of the following equipment:
(a) Fume chamber
(b) Safety shower
(c) Laboratory coat
Answer:
(a) A specially designed equipment to carry out experiments that release fumes that are toxic, flammable or pungent.
(b) Used to wash and clean the body when accidents occur to the body. This equipment is also used to put out fire that occurs on the body.
(c) Used to protect the body and clothes from spillage of chemicals such as acid, alkali and organic solvent.
Give the functions of the following equipment:
(a) Fume chamber
(b) Safety shower
(c) Laboratory coat
Answer:
(a) A specially designed equipment to carry out experiments that release fumes that are toxic, flammable or pungent.
(b) Used to wash and clean the body when accidents occur to the body. This equipment is also used to put out fire that occurs on the body.
(c) Used to protect the body and clothes from spillage of chemicals such as acid, alkali and organic solvent.
Question 3:
How would you manage solid wastes such as glass and rubber in the laboratory?
Answer:
Solid residue such as glass and rubber must be thrown in special containers.
How would you manage solid wastes such as glass and rubber in the laboratory?
Answer:
Solid residue such as glass and rubber must be thrown in special containers.
Question 4:
Explain how you would test the presence of oxygen and hydrogen gases.
Answer:
Oxygen gas – put a glowing wooden splinter into the test tube; the glowing wooden splinter is rekindled.
Hydrogen gas – put a lighted wooden splinter at the mouth of the test tube; a ‘pop’ sound is heard.
Explain how you would test the presence of oxygen and hydrogen gases.
Answer:
Oxygen gas – put a glowing wooden splinter into the test tube; the glowing wooden splinter is rekindled.
Hydrogen gas – put a lighted wooden splinter at the mouth of the test tube; a ‘pop’ sound is heard.
Question 5:
Explain how you can get the most accurate reading in titration.
Answer:
Repeat the titration until the difference of two volume values does not exceed 0.05 cm3.
Explain how you can get the most accurate reading in titration.
Answer:
Repeat the titration until the difference of two volume values does not exceed 0.05 cm3.