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Aqua Science
Chapter 7 Vocabulary
| Question | Answer |
|---|---|
| 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
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