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Aqua Science

Chapter 7 Vocabulary

Alkaline The measure of a basic substance in water. Any substance registering over 7 on the pH scale
Anaerobic A term used to describe an organism or process that does not require O2.
Anions Negatively charged ions such as bicarbonate of soda (baking soda) or limestone (calcium carbonate)
Beers Law The higher a concentration of a substance, the darker the color produced on the test strip (colormetric tests are based on this)
Buffers These substances, when added to water, do not allow rapid changes in pH. An example of a buffer is bicarbonate of soda. Buffering capacity is expressed as alkalinity.
Cations A positively charge ion.
Colorimetric A colorimetric test determines the quantity of a substance by the measurement of the intensity of light transmitted by the solution of a substance
Conductance The ability of a substance to allow the passage of electrical current. Used to measure Total Dissolved Solids.
Effluent A term used to describe water discharge from a rearing facility, treatment plant or an industry.
Grams Per Liter Large concentrations of substances in solution can be recorded as this or as Parts per Thousand
Heat Capacity The ability of a substance to resist changes in temperature
Heavy Metals Mercury, Lead and Chromium are examples of these. They can bioaccumulate in organisms and can cause human health problems.
Hydroponics Growing plants without soil, using a nutrient solution.
Ions Electrically charged atoms, radicals or molecules.
Logarithmic A mathematical scale where each step is 10 times the step before. It is used to express pH.
Part per billion Equal to 1 microgram per kg or 1 microgram per L. A concentration at which 1 part is contained in a total of 1 billion units.
Part per million A concentration that is also expressed as 1 mg/L. It is the most common unit to measure substances' concentration in water.
Part per thousand Equivalent to 1 g/L or 1 unit out of one thousand units.
Salinity The concentration of sodium, potassium, magnesium, calcium, bicarbonate, carbonate, sulfate, chloride, fluoride, bromide in water.
Acid - Base Substances that have a non-nuetral pH. Strong forms of either can cause severe burns
Water Hardness A measurement of the total concentration of calcium and magnesium
Wastewater Water that has been used in a manufacturing, processing, or production facility.
Turbidity Presence of suspended or colloidal material that reduces light penetration
Titrimetric Describes a test that uses a titrant added to a known or specific volume of sample in the presence of an indicator.
Solubility The degree to which a substance can be dissolved in a liquid.
Created by: clawrence