Notes on tips for Biology Paper 5 Exam.
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CO2:
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Usually, most of the CO2 absorbents are with -OH eg: NaOH or KOH
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Sources of CO2 are usually those with the -CO3 eg: CaCO3, H2CO3
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a non-chemical source: gas cylinder
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the gas is supplied through a bubbler.
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to measure CO2 concentration: use probe with meter]
Temperature:
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method of controlling: use an electronic water-bath (a beaker of boiling
water)-depends on the experiment
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use an electronic thermostat
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heat screen*/ heat filter
*for uniform distribution of heat.
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incubator
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digital/mercury thermometer
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for food tests, such as Benedict's test, the temp must be above 80'C.
Time:
Always mention:
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