1.3 Laboratory safety1.3 Laboratory safety• Safety rules about working and behaving in the

laboratory:

1 Do not enter the laboratory unless a teacher is present.

2 Do not run or play in the laboratory.

3 Do not remove anything from the laboratory without your teacher’s permission.

Fig. 1.6bThe correct wayof smelling a gas

Fig. 1.6aUse a spatula to transfer solid chemicals

1.3 Laboratory safety1.3 Laboratory safety• Safety rules about working and behaving in the

laboratory:

4 Never use your bare hands to transfer chemicals. Use a spatula or spoon.

5 Never leave experiments unattended. 6 Never smell gases directly - fan a little of the gas towards your nose.

1.3 Laboratory safety1.3 Laboratory safety• Safety rules about working and behaving in the

laboratory:

7 Never look directly down the test tube or point the mouth of the test tube towards anyone when

heating.

8 Never tasteanything without

teacher’s permission.

Fig. 1.6cPoint the mouthof a test tube away from anyone when holding thetest tube for heating

1.3 Laboratory safety1.3 Laboratory safety• Safety rules about working and behaving in the

laboratory:

9 Never eat or drink in the laboratory.

10 Do not put solid substances into the sink.

11 Always follow strictly the instructions given by your teacher.

1.3 Laboratory safety1.3 Laboratory safety• Safety rules about working and behaving in the

laboratory:

12 Always read the label on a reagent bottle carefully to make sure it contains the

chemical you want. Put the bottle in its originalplace immediatelyafter use.

13 Wear safety glasseswhenever necessary.

Fig. 1.6dWear safety glasses whenever necessary

1.3 Laboratory safety1.3 Laboratory safety• Safety rules about working and behaving in the

laboratory:

14 Always handle flammable substances with great care and keep them away from flames.

15 Always handle concentrated acids and alkalis with great care.

16 Report all accidents and breakages to your teacher. If any chemicals get onto your

skin or clothing, wash the affected area with plenty of water.

1.3 Laboratory safety1.3 Laboratory safety• Safety rules about working and behaving in the

laboratory:

17 Turn off the Bunsen burner when it is not in use.

19 Dispose chemical wastes and excess materials according to your teacher’s instruction. 19 Always wash your hands thoroughly after

experiments.