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Properties of Water
Water, Matter, and pH
Term | Definition |
---|---|
polar | unequal sharing of electrons |
cohesion | water sticks to water |
adhesion | water sticks to other substances |
surface tension | the film formed on the surface of water; caused by cohesion |
capillary action | water to move upward |
universal solvent | water dissolves many substances |
atom | smallest unit of matter |
element | pure substance consisting of 1 type of atom |
compound | 2 or more elements bonded in a fixed proportion |
radioactive isotope | unstable nucleus of an atom that breaks down at a constant rate |
ionic bond | bond created when electrons are transferred |
covalent bond | bond created when electrons are shared |
hydrogen bond | weak bond formed between the oxygen of one water molecule and the hydrogen of another |
molecule | atoms held together by covalent bonds |
solute | substance that is dissolved |
solvent | substance that dissolves the solute |
solution | solute+solvent |
suspensions | water and non-dissolved material |
isotope | atoms of the same element with different number of neutrons |
mixture | 2 or more elements mixed but easy to physically separate |
ionize | break and form bonds |
acid | ph below 7: more H+ ions |
base | ph above 7. more OH- |
neutral | ph of 7 |
buffer | weak acid or base that reacts with strong ones to prevent sudden changes in pH. helps to maintain homeostasis. |