Question

Smitha has to solve two problems. She needs help solving these problems.
a) Problem 1: Smitha has a container with a mixture of sand, salt, cooking oil
and vinegar. Her teacher has asked her to separate all the 5 components from
the mixture.
Examine the components present in the mixture and explain the suitable
separating methods for all the components.
[Hint: Vinegar is a mixture of acetic acid and water. Boiling point of acetic
acid and water is 117.90C and 1000C respectively.] (5m)
b) Problem 2: Smitha’s teacher has asked her to prepare potassium chloride
solution of concentration 10% (mass by mass) using 100g of distilled water.
She weighed 10g of potassium chloride and dissolved it in 100g of distilled
water. Her teacher marked it wrong.
i) What was the concentration of the potassium chloride solution prepared
by Smitha? Explain what went wrong. Justify your answer with relevant
calculations.
ii) What mass of potassium chloride would you recommend Smitha to use to
prepare the required concentrated solution of potassium chloride using
100g of water. Explain your answer with relevant calculations.

Answer 1

Answer:

bro just go sleep why will you ask now

Answer 2

Smitha has to solve two problems. She needs help solving these problems.
a) Problem 1: Smitha has a container with a mixture of sand, salt, cooking oil
and vinegar. Her teacher has asked her to separate all the 5 components from
the mixture.
Examine the components present in the mixture and explain the suitable
separating methods for all the components.
[Hint: Vinegar is a mixture of acetic acid and water. Boiling point of acetic
acid and water is 117.90C and 1000C respectively.]