C2F Revision C2f Revision Notes 0.0 / 5 ? ChemistryAcids, bases and saltsGCSEOCR Created by: Harriet.beaCreated on: 24-11-15 19:29 Indicators Chemicals that change colour to show the change in pH. 1 of 12 Acids Substances with a pH of less than 7. 2 of 12 Bases Oxides and hydroxides of metals with a pH greater than 7. 3 of 12 Alkalis Soluble bases. 4 of 12 Metal oxides and hyrdroxides Both Bases. 5 of 12 Neutralisation Acid + Base ---> Salt + Water 6 of 12 Where does the first name of a salt come from? It comes from the name of the base or carbonate used. An example of this is: sodium hydroxide will make a sodium salt 7 of 12 Where does the second name of the salt come from? It comes from the acid used, an example being: hyrdochloric acid will make a chloride salt or sulphuric acid will produce a sulphate salt. 8 of 12 Sodium Hyrdoxide + hyrdochloric acid -----> ?+? ---> Sodium Chloride + Water 9 of 12 Alkalis in a solution contain ... ...hydroxide ions, OH-. 10 of 12 Acids in a solution contain... ...hydrogen ions, H-. 11 of 12 Ionic neutralisation equation H+ + OH- --> H2O 12 of 12
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