 | Term | Definition |
| |
What is pH scale? |
a scale used to measure how acidic or basic a liquid is |
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What is an acid? |
a solution that has an excess of H+ ions |
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What is base? |
a solution that has an excess of OH- ions |
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What is a neutral? |
a solution that has a pH of 7 |
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What is pH actually a measure of? |
the number of H+ ions in a solution |
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What does a high and low pH indicate regarding number of H+ and OH-? |
A lot of H+ ions indicates low pH. a lot of OH- ions indicate that the number of H+ ions is very low, so the pH is high |
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What shape is a water molecule? |
a bent shape |
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What is a polar molecule? |
A molecule in which the charges are unevenly distributed |
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Describe hydrogen bonds? |
They are not as strong as covalent or ionic bonds |
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What is cohesion? |
an attraction between molecules of the same substance |
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What is adhesion? |
an attraction between molecules of different substances |
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What is a mixture? |
a material composed of two or more elements or compounds that are physically mixed together but not chemically combined |
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What is a suspension? |
a mixture of water and non dissolved material |
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What is a buffer? |
a weak acid or base that can react with strong acids or bases to prevent sharp, sudden changes in pH |
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What is a precipitate? |
solid materials formed |
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What percentage of the body is made up of water? |
70-80% |
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What type of compound is H2O? |
a polar compound |
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What does water dissolve? |
ionic substances and other polar compounds such as sugar |
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What is responsible for the unique characteristics of water? |
hydrogen bonds |
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What are isotopes? |
atoms which have missing or extra neutrons |
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What happens to atomic mass of isotopes? |
the atomic masses are different but they still have the same element |
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What is radioactive decay? |
loss of neutrons over a specific amount of time |
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What isotope was used om external beam in radiotherapy? |
Cobalt 60 |
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What is used in the detection of thyroid malfunction? |
Iodine 123 |
| |
What is used in the treatment of Polycytheniavera (excessive production of red blood cells) |
Phosphorus 32 |
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