chemistry unit test; chapter 5 + 6 Flashcards
a precipitate is:
an insoluble solid formed in a chemical reaction.
the six clues that suggest a chemical change are:
formation of a gas, formation of a precipitate, a change in colour, a change in odour, and/or the production of light and heat.
a synthesis reaction is:
a chemical reaction in which two or more reactants combine to produce a new product.
the general chemical equation for a synthesis reaction is:
A + B → AB
a single displacement reaction is:
a chemical reaction in which one element takes the place of another element in a compound.
the general chemical equation for a single displacement reaction is:
A + BC → AC + B
a decomposition reaction is:
a chemical reaction in which a compound breaks down (decomposes) into two or more simpler compounds or elements.
the general chemical equation for a decomposition reaction is:
AB → A + B
the activity series is:
a list of elements organized according to their chemical reactivity; the most reactive element appears at the top and the least reactive element appears at the bottom.
a double displacement reaction is:
a chemical reaction in which the positive ions of two different compounds exchange places, resulting in the formation of two new compounds, one of which may be a precipitate.
the general chemical equation for a double displacement reaction is:
AB + CD → AD + BC
the word acid comes from the word —- and means:
the Latin word acidus and means sour.
an acid is:
a compound that produces hydrogen ions, H+, when dissolved in water.
a binary acid is:
an acid composed of hydrogen and a non-metal.
to name a binary acid:
write the root of the metal name, add the prefix hydro- to the root name and then at the ending -ic acid to the root name. (example; HF → hydrofluoric acid)
