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GCE O LEVEL SYLLABUS 2010 Volumes of Gases
CHEMISTRY (5070) Measured with gas syringe, up to 100 cm3
Name: _____________________________________ Date: ____________
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Temperature
CHAPTER 1 – EXPERIMENTAL CHEMISTRY Measured with thermometer. 2 types are:
1.1 Experimental Design a) Mercury-in-glass
Volumes of Liquids b) Alcohol-in-glass
SI unit: cubic metre (m3) SI Unit: Kelvin (K)
Large volume measurement: decimetres (dm3) Daily life measurement: degree Celcius (oC)
1 dm3 = 1 000 cm3 K = oC + 273
Daily life measurement: millilitres (ml) or litres(l)
1 litre = 1 000 ml Time
Apparatus for measuring liquids depends on: SI Unit: seconds (s)
- The volume being measured Other Units: minutes (min)/hour (h)
- How accurate the measurement needs to be Measured with:
(a) Clock
- Beaker hold approximate volume of 100 cm3 and 250 cm3. (b) Digital stopwatch
- Conical flask hold approximate volume of 100 cm3 and 250 cm3.
- Measuring cylinder has accuracy to 1 cm3. Mass
- Reading to be taken nearer to the meniscus (bottom line). Mass – the measure of amount of matter in a substance
- If reading is 23 cm3, should not write 23.0 cm3 as the ‘0’ means accurate to SI Unit: kilogram (kg)
0.1 cm3. Other Units: grams (g)/milligrams (mg)
- Burette has long scale of 0 – 50 cm3, accurate to 0.1 cm3. Large volume measurements: tonnes (t)
- Liquid level to be measured before and after tap opening. The difference of 1 tonne = 1 000 kg
volume gives the liquid volume poured off. Measured with:
- Bulb pipette measures exact volumes such as 20.0, 25.0 or 50.0 cm3, not odd (a) Electric “top-pan” balance
volumes such as 31.0 cm3. (b) Triple beam balance
www.studyguide.pk
, Copyrights AF/PS/2009/2010 1
www.studyguide.pk
1
, Copyrights AF/PS/2009/2010 2
www.studyguide.pk
2
, Copyrights AF/PS/2009/2010 3
www.studyguide.pk
GCE O LEVEL SYLLABUS 2010 Volumes of Gases
CHEMISTRY (5070) Measured with gas syringe, up to 100 cm3
Name: _____________________________________ Date: ____________
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Temperature
CHAPTER 1 – EXPERIMENTAL CHEMISTRY Measured with thermometer. 2 types are:
1.1 Experimental Design a) Mercury-in-glass
Volumes of Liquids b) Alcohol-in-glass
SI unit: cubic metre (m3) SI Unit: Kelvin (K)
Large volume measurement: decimetres (dm3) Daily life measurement: degree Celcius (oC)
1 dm3 = 1 000 cm3 K = oC + 273
Daily life measurement: millilitres (ml) or litres(l)
1 litre = 1 000 ml Time
Apparatus for measuring liquids depends on: SI Unit: seconds (s)
- The volume being measured Other Units: minutes (min)/hour (h)
- How accurate the measurement needs to be Measured with:
(a) Clock
- Beaker hold approximate volume of 100 cm3 and 250 cm3. (b) Digital stopwatch
- Conical flask hold approximate volume of 100 cm3 and 250 cm3.
- Measuring cylinder has accuracy to 1 cm3. Mass
- Reading to be taken nearer to the meniscus (bottom line). Mass – the measure of amount of matter in a substance
- If reading is 23 cm3, should not write 23.0 cm3 as the ‘0’ means accurate to SI Unit: kilogram (kg)
0.1 cm3. Other Units: grams (g)/milligrams (mg)
- Burette has long scale of 0 – 50 cm3, accurate to 0.1 cm3. Large volume measurements: tonnes (t)
- Liquid level to be measured before and after tap opening. The difference of 1 tonne = 1 000 kg
volume gives the liquid volume poured off. Measured with:
- Bulb pipette measures exact volumes such as 20.0, 25.0 or 50.0 cm3, not odd (a) Electric “top-pan” balance
volumes such as 31.0 cm3. (b) Triple beam balance
