Acids Bases And Salts Flashcards
What is bleaching powder commonly used for?
Bleaching cotton and linen, bleaching wood pulp, bleaching washed clothes, as an oxidising agent, and making drinking water free from germs.
What is the chemical name of baking soda?
Sodium hydrogencarbonate (NaHCO₃)
Which raw material is used to produce baking soda?
Sodium chloride (NaCl)
What is the reaction for producing baking soda?
NaCl + H₂O + CO₂ + NH₃ → NH₄Cl + NaHCO₃
What happens when sodium hydrogencarbonate is heated?
NaHCO₃ → Na₂CO₃ + H₂O + CO₂
What is one household use of baking soda?
Making baking powder
What is baking powder composed of?
Baking soda and a mild edible acid such as tartaric acid
What gas is produced when baking powder is heated or mixed with water?
Carbon dioxide (CO₂)
What is the effect of carbon dioxide in baking?
It causes bread or cake to rise, making them soft and spongy.
How does sodium hydrogencarbonate function in antacids?
It neutralises excess acid in the stomach.
What is the chemical formula for washing soda?
Na₂CO₃·10H₂O
How can washing soda be obtained from sodium chloride?
By heating baking soda and through recrystallisation.
True or False: Sodium carbonate is a basic salt.
True
Fill in the blank: Sodium hydrogencarbonate is a _______ basic salt.
mild non-corrosive
What is the primary use of washing soda?
It is used in household cleaning and as a water softener.
What reaction occurs when baking soda is mixed with an acid?
Produces carbon dioxide, water, and sodium salt of the acid.
What is common salt used for?
Common salt is an important raw material for various daily use substances, such as sodium hydroxide, baking soda, washing soda, and bleaching powder.
What is brine?
Brine is an aqueous solution of sodium chloride (NaCl).
What process is used to produce sodium hydroxide from brine?
The chlor-alkali process is used to produce sodium hydroxide from brine.
What are the products formed in the chlor-alkali process?
The products formed are sodium hydroxide, chlorine gas, and hydrogen gas.
What happens at the anode and cathode during the chlor-alkali process?
Chlorine gas is given off at the anode, and hydrogen gas is produced at the cathode.
What is the chemical equation for the chlor-alkali process?
The chemical equation is: 2NaCl(aq) + 2H₂O(l) → 2NaOH(aq) + Cl₂(g) + H₂(g).
How is bleaching powder produced?
Bleaching powder is produced by the action of chlorine on dry slaked lime (Ca(OH)₂).
What is the representation of bleaching powder?
Bleaching powder is represented as Ca(OCl)₂.
What is the reaction for producing bleaching powder?
The reaction is: Ca(OH)₂ + Cl₂ → Ca(OCl)₂ + H₂O.
What is the colour of caco3
White
Ca (HCO3)2 is a precipitate true or false
False
Vinegar contains which acid
Acetic acid
Orange tamarind tomato respectively contain which acids
Citric tartaric oxalic acid
Milk lemon and sting needle sting respectively contain which acids
Lactic citric methanoic acids
