Waec Chemistry Practical Question and Answer 2023

2023 WAEC Chemistry Practical Expo 

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Chemistry Practical Answer

NO1

 

 

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NO2

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(3ai)
– Formation of a precipitate; Sodium hydroxide reacts with lead nitrate to form lead(ii) hydroxide as a precipitate.
Pb(NO3)2 + 2NaOH –> Pb(OH)2 + 2NaNO3

– Cloudiness or opacity; As the lead(ii) hydroxide precipitate forms, the solution may become cloudy or opaque due to the presence of the solid particles suspended in the liquid

(3aii)
– Formation of precipitate; Iron(iii) Fe(OH)3 is insoluble in water and appears as a reddish brown precipitate.
– Colour change; Colour change form yellowish to reddish brown

(3b)
– Obtain a small amount of benzoic acid
– Prepare a melting point apparatus
– Fill the capillary tube with the sample of benzoic acid powder
– Insert the capillary tube unit the melting point apparatus
– Begin heating the temperature is increased at a slow rate you allow pressure observation of the melting point
– Observe the melting point
– Repeat the process to ensure accuracy
– Record the melting poin

 

 

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COMPLETED….

 

 

The West African Examinations Council, 2023 WAEC Chemistry practical question and answer for this year (2023) is live here on Expospy.com.ng, the best exam portal of all time.

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As extracted from the 2023 timetable, WAEC Chemistry practical will be held Tuesday, 16/05/2023.

Here is the schedule of all exams scheduled for the day.

Thursday, 18th may, 2023

Chemistry 3 (Practical) (Alternative A) 9:30am – 11:30am (1st Set)
Chemistry 3 (Practical) (Alternative A) 12:00noon – 2:00pm (2nd Set)

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