Lesson Notes By Weeks and Term - Senior Secondary 2

TERM׃ 1^ST TERM

WEEK EIGHT

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:        

Subject: Chemistry

Topic: MASS, VOLUME RELATIONSHIP 2

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Carryout unit conversion on mass and volume.
2. Perform simple calculations using mass and volume.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

Thus, volume before sparkling       20cm³          42cm³

Reacting volume                           20cm³        10cm³

After sparkling                              32cm³         20cm³

Unit Conversion of Mass and Volume

The standard SI units of mass and volume are kilograms and cubic meters respectively, yet most appliances do not present them in their standard units. The cheese and apples bought from the market are often weighed in grams rather than kilograms, and the scale used to measure the amount of ingredients presents the mass in grams as well. And the pipettes used in labs are always in milliliters.

The following table shows how one unit can be converted to another.

Mass.                                Volume

1 kg = 1000 g = 2.204 lb 1 m3 = 1000 cm3

1 g = 100 cg = 1000 mg  1 dm3 = 1 L = 1000 mL

1 lb = 16 ounces                 1 mL =100 cL

1 ton = 2000 lb                  1 gallon = 4.54 L

NOTE: These conversions can be used to find the mass, volume, and density in different units. When performing calculations, it must be confirmed that all units are consistent, 1 g/mL cannot be multiplied with 3 L, and the correct action is to either convert the density to g/L or convert the volume to mL. All units must be uniform in order to get correct results.

The SI unit for quantities

The SI unit, or International System of Units, is a system of measurement used worldwide for expressing various physical quantities, for instance, the SI unit for length is the meter (m), for mass is the kilogram (kg), and for volume is the cubic meter (m³).

EVALUATION:  - What is the mass of 2.7 mole of Aluminium.(Al = 27) ?

-  In an Experiment, 10cm³ of ethene(C₂H₄) was burnt in 50cm³ of oxygen.

1. Which gas was supplied in excess? Calculate the volume of the excess gas remaining at the end of the reaction.
2. Calculate the volume of CO₂ gas produced.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively