chemistry
definition of acid
a chemical compound that releases positively charged hydrogen ions when dissolved in water
is base a proton acceptor or donor
proton acceptor
name two soluble bases
-calcium hydroxide & ammonium hydroxide
name all the 6 properties
corrosive , bitter , pH level above 7 , turn litmus to blue , soapy , universal indicator turns from green to blue/purple
name two insoluble bases
calcium carbonate & iron (ii) hydroxide & copper oxide
form and equation with the words given
-hydrochloric acid
-sodium hydroxide
-hydrochloric acid + sodium hydroxide -> sodium chloride + water
definition and 2 examples for amphoteric oxides
metal oxides that can react with both acid and alkalis , lead oxides , aluminium oxides and zinc oxides
name 4 physical properties of acid
turns litmus to red , corrosive(dont write this in exam) , pH level below 7 , sour
difference between acidic oxides and neutral oxides
-metal oxides that shows acidic properties
-metal oxides that dont react with acid and base
spell out the indicators that starts with p and t
phenolphthalein , thymolphthalein
what is Al2O3 in worded form
aluminium oxide
give 3 examples of indicators to use for an experiment
litmus paper , methyl orange/red , phenolphathalein , thymolphthalein , universal indicator
how to differentiate between weak and strong acids
by how easily H+ ions can be formed / dissociated when water is added
name 3 mineral acids and one organic acid
hydrochloric , phosphoric , sulfuric , nitric , carbonic , ethanoic
name an equation under acids and give an example
-acid + base/alkali -> salt + water
-acid + metal -> salt + hydrogen
-acid + metal carbonate -> salt + water + carbon dioxide
what is NO2 in worded form
nitrogen dioxide
what happens to the litmus paper when sodium hydroxide is added
it will turn red litmus paper to blue
if the universal indicator turns orange or yellow , what is the property of the solution
weak acid
what happens to methyl orange when you put acidic solution in it
turns red
what happens when you add base and ammonium salt together
you will get salt + ammonia + water
name 2 examples of basic oxides
sodium oxide , potassium oxide , magnesium oxide
definition of alkali
a chemical compound that releases negatively charged hydroxide ions when dissolved in water
if a universal indicator turns blue what is the property of the solution
weak base
what is basic oxides , give an example
metal oxides that dissolves in water to form alkalis
give an example for this equation
(base + ammonium salt -> salt + water + ammonia)
any suitable answer will do