Chapter 5 Acid, Base s And Salt Flashcards
How can u obtain salt from a simple sample sea water
Evaporation the water apply heart to the dish and cool it and crystallize it remains with dry salt
What is the solution which gives a red brown ppt
Iron III
How can you distinguish between a strong and weak acid
Strong acid dissociate completely while a weak acid dissociates partially
How can u know if substance A was and acid or not
Buy using a litmus paper
Red or blue
Where red litmus paper when dipped in an acid remains red
Blue turns red when dipped in an acid
Sodium chloride likely to have what ph
7
Name a salt that can be obtained from a metal and a dilute acid
Zinc sulphate
Element which has green crystals
Iron sulphate
Sodium hydroxide can react with a certain acid oxide to produce a salt called sodium sulphate name the acid oxide used
Sulphuric acid
What can you see when little copper II oxide warmed with dilute nitrate acid
Crystalline solids are formed in a solution
Hydrochloric acid likely to have what ph
2
What’s an acid
A substance which produces hydrogen ions as the only positively ions when dissolved in water
Name a molecule with a colorless liquid
Water
What is used to measure the acidity or alkalinity of a substance
Ph meter
When copper II oxide reacts with dilute nitrite acid how does copper II OXIDE behave
It behaves as a base which neutralize an acid
Which ion is responsible for acidity
Hydrogen
H+
What solution has a green ppt
Iron II
Acids have a sour taste what ion is responsible for this taste
Hydrogen H+
A first aid kit manual suggest that vinegar should be used to treat wasp sting and baking powered for bee sting
What’s the chemical nature for wasp stings
The wasp stings are alkaline therefore an acid will act on the wasp to neutralize the wasp stings
What is neutralization reaction
It’s a reaction in which a base react with an acid to form salt and water
State an ion responsible for alkalinity of a solution
The hydroxide ion H-
Oxides ion
Which solution has a white ppt
Chloride
Why hydrogen chloride has no effect on a dry blue litmus paper
Because hydrogen chloride is a neutral salt
If We had no baking powered in the house what can we use to treat bee stings
Toothpaste
What happens when we mix a base and acid
Naturalization occur
What’s common name for sodium hydrogen carbonate
Baking soda
Small amount of baking soda was added effervescence occurred
Producing a gas name gas produced
Carbon dioxide
What’s a salt
It is a compound formed when hydrogen ions in an acid are replaced by a metal ions
What’s a normal salt
A salt which contains no replaceable hydrogen
How can u obtain pure salt of iron II sulphate from its crystal solution
Heat solution gently to concentrate it
Filter colorless crystalline
And recrystallize them
Filter off excess liquid
Let crystal dry
Pure iron sulphate is formed
Name the reactant that produce zinc chloride
Hydrochloric acid and zinc hydroxide
When the oxide and hydrogen are equal then it’s said to be
Neutral
How can you obtain zinc chloride crystals from the solution of water and zinc chloride
By putting it in evaporating dish and leave pure crystal called zinc chloride
