Flashcards
the pH scale and salts
Cards in this deck (24)
- 1what happens when substances dissolve in waterwhen substances dissolve in water, they dissociate into there individual ions
- 2what is a pH scaleit is a measure of the acidity or alkalinity of an aqueous solution
- 3what do the different colours of the pH scale mean
- 4how can the pH of a solution be measuredusing a pH probe or a universal indicator
- 5what are indicatorsindicators are dyes that change colour depending on whether they are in acids or alkali solutions
- 6what are alkaliessoluble bases are called alkalis
- 7acids are neutralised by basis.. write an equation for this
- 8what ions do acids containhydrogen ions H+(aq)
- 9what ions do alkali containhydroxide ions OH-(aq)
- 10what happens when an acid reacts with an alkali
- 11what is the reaction between an acid and an alkali calledthis type of reaction is called a neutralisation reaction because
-acid is neutralised by alkali
-the solution that remains has a pH of 7, showing it is neutral - 12acids can also be neutralised by metal oxides and metal carbonates write a word equation for this
- 13draw and label the pH scale
- 14when is a salt produceda salt is produced when the hydrogen in the acid is replaced by a metal ion
- 15what does the name of the salt produced depend onit depends on the acid used
-hydrochloric acid produces chloride salts
-Nitric acids produces nitrate salts
-sulfuric acid produces sulfate salts - 16how can soluble salts be madesoluble salts can be made by reacting acids with insoluble bases, such as metal oxides metal hydroxides and metal carbonates
- 17RP)write a method for preparation of pure, dry sample of a soluble salt and insoluble oxide or carbonate
- 18what are strong acidsstrong acids are completely ionised (split up into ions) in water
- 19give an example of a strong acid and write a symbol equation for it
- 20give a an example of a weak acid and write a symbol equation for it
- 21what is the pH of a solution the measure ofthe concentration of H+ions
- 22what does the pH decrease of one unit indicateit indicates that the concentration of hydrogen ions has increased by a factor of 10
- 23finish the sentence for a given concentration of acid, a strong acid will have a ____ concentration of hydrogen ions and therefore a ___pHmissing words are
1-higher
2-lower - 24which one is ore concentrated -2mol/dmcubed or -0.5mol/dmcubed2mol/dmcubed
Information
- Description
- GCSE chemistry new Flashcards on the pH scale and salts , created by ella stokes on 28/11/2017.
- Created by
- ella stokes
- Views
- 0
- Rating