Apparatus Flashcards

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1
Q

How do I accurately record PH

A

use a digital PH data logger

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2
Q

How to accurately record mass

A

Use a digital mass balance that records to 2 dp

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3
Q

How to accurately record temperature

A

Use a digital thermometer

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4
Q

How to accurately record length

A

Use a ruler with mm increments

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5
Q

How to accurately record volume

A

Use a measuring cylinder or syringe with a high resolution eg 0.1 ml

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6
Q

What is a colorimeter

A

An instrument that can determine the concentration of a solution it turns qualitative colours into quantitative values based on the absorbance of light

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7
Q

When would you use a calorimeter?

A

When your results are qualitative eg different coloured solutions, and you need to turn it into quantitative values

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8
Q

When would you use a potometer

A

When you need to measure the rate of transpiration in plants, you would investigate the effect of a different variable on transpiration rate

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9
Q

List the glassware need it for serial dilution

A

Test tubes or boiling tubes beakers to hold the distilled water and original solution You are going to dilute

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10
Q

What is an eyepiece graticule?

A

A glass disc with a scale on it, that is inserted into the eyepiece of a microscope used to measure the size of specimens viewed under the microscope

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11
Q

How do you calibrate an eyepiece graticule?

A

Lineup the stage and the eyepiece graticule, whilst looking through the eyepiece count, how many divisions on the eyepiece graticule fit onto a division on the micro meter scale,

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12
Q

Why do you need to calibrate the eyepiece graticule?

A

Each time you change the objective lens, and therefore the magnification, you have to calibrate the eyepiece to work out the distance between each division represented at that magnification

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