NECO Chemistry Practical Specimen 2024/2025 PDF

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NECO chemistry practical specimen

Are you looking for the real 2024 NECO Chemistry Practical Specimen answers? Are you looking for the instructions on how to carry out the 2024 chemistry Practical for NECO? Here is the good news: the NECO 2024 chemistry Practical Specimen has been released. All science students who are taking this examination are expected to study them before hand. If so, this post is for you.

This post helps you understand the syllabus or area of concentration for the forthcoming NECO Chemistry Practical examination. All you have to do is to sit back and pay attention to this post.

In this post, School Isle will show you the list of specimen as approved by the National Examination Council (NECO).

Is the real NECO Chemistry Practical Specimen Out for 2024?

Yes, the legit and latest specimen (syllabus) for this year’s NECO chemistry examination has just been released. All you need is to sit back, study it and get ready to pass your exams.

Ensure to understand each instruction, tool and their uses.

Others are searching: NECO SSCE chemistry Practical questions and answers 2024/2025, NECO chemistry practical specimen 2024, list of specimens for 2024 chemistry and labels.

All chemistry practical exam real questions and answers will be posted here during your examination. Keep refreshing this page for more updates…

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2024 NECO Chemistry Practical Specimen (Detailed)

Below are the full list of tools required for the chemistry practical examination including how teacher’s reports should look like. Pay kin attention to them.

INTRUCTION(S) TO SCHOOL

1. Great care should be taken to ensure that the information given below does not reach the candidates either directly or indirectly before the examination.

2. In addition to the apparatus and reagents expected to be available in a Secondary school chemistry Laboratory, each candidate will require the following:

(a) One burette (50cm3)
(b) One Pipette (20cm3 or 25cm3)

However, all candidates in a centre must use pipettes of the same volume

(c)  The usual apparatus for filtration

(d) The usual apparatus and reagent for qualitative work including:

(i) Dilute sodium hydroxide solution
(ii) Dilute ammonia solution
(iii) Dilute hydrochloric acid
(iv) Barium Chloride solution
(v) Distilled water
(vi) Red and blue litmus paper
(vii) Phenolphthalein
(viii) Methyl orange
(ix) One boiling tube
(x) Five test tubes
(xi) Source of heat
(xii) Wash bottle containing distilled water
(xiii) Filtration apparatus

3. Each candidate should be supplied with the following:

where ‘n’ is the candidate’s serial number

(a) 150 cm3 of tetraoxosulphate (VI) solution in a corked flask or bottle labelled ‘An’. These should all be the same containing 2.20cm3 of concentrated tetraoxosulphate (VI)  acid per dm3 of solution.

(b) 150 cm3 of Na2CO3 in a corked flask or bottle labelled ‘Bn’. These should all be the same containing 3.6 g of sodium trioxocarbonate (IV) pellet per dm3 of solution.

(c) One spatula of Na2CO3 in a corked specimen bottle labelled ‘Cn’. Note ‘n’ is the candidate’s serial number.

In all cases, more materials may be given if required.

The actual concentration of A and B must be stated on the Teacher’s report from while the candidates should make use of the concentration stated in the question paper.

6.  Please, do not substitute any substance or solution for those specified in these instructions

ARRANGEMENT AND SERIAL NUMBER OF CANDIDATES

7. Please for work by candidates in the laboratory should number serially and the candidate allotted this place strictly in order for the examination number.

8. The number of every specimen supplied to each candidate should be continued through the sets, to ensure that no serial number is repeated.

9. If candidates are divided into sets, the serial number should be continued through the sets, to ensure that no serial number is repeated

10. Ensure that the candidates record their serial numbers as well as their registration numbers on the front page of their answer booklets at the beginning of the examination.

TEACHER’S REPORT

The guide below shows how the NECO Practical examination report should written and submitted to the examiner. Please, follow this guideline strictly.

11. Ensure that a completed Teacher’s Report form is enclosed in each envelope of the script. This report form is provided separately.

12. Carry out the titration required of the candidates in question one and record the titre values, which should be at least, one decimal place in the spaces provided for these in the Teacher Report Form. Verify the titre values before recording them.

13. All difficulties experienced by candidates should be reported, especially if the examiner would be unable to discover these from the scripts.

NECO chemistry Practical Sample Questions and Answers 2024

The questions and answers below shows the 2024  possible NECO SSCE  Practical questions and answers. It is designed to help you prepare for your examination. 

Now, let’s take a look at some sample questions and answers to give you an idea of what to expect in the NECO Chemistry Practical exam:

Question 1: Titration Experiment

In this experiment, you are provided with 20.0cm³ portions of 0.065 mol dm-3 NaOH and are required to titrate them against dilute HCl.

The table below shows the results of the titration:

NECO chemistry practical

(a) (i) Name a suitable indicator for titration and give a reason for your answer. Answer: A suitable indicator for this titration is methyl orange. It changes color in the acidic pH range and provides a clear visual indication of the endpoint. (ii) Give the color of the indicator in the base and at the endpoint.

Answer: The indicator is yellow in the base and changes to red at the endpoint.

(iii) What type of reaction is demonstrated by the experiment?

Answer: The experiment demonstrates a neutralization reaction between an acid (HCl) and a base (NaOH).

(b) (i) Write a balanced equation for the reaction.

Answer: The balanced equation for the reaction is: NaOH(aq) + HCl(aq) -> NaCl(aq) + H2O(l)

(ii) Determine the average volume of acid used.

Answer: The average volume of acid used is calculated by taking the average of the three titration values: (23.50 + 23.10 + 23.40) / 3 = 23.33 cm³

(c) Calculate the: (i) concentration of the acid in moldm-3 (ii) concentration of the acid in gdm-3 (iii) mass of HCl in 20cm³ of solution [H = 1.00, Cl = 35.5]

Answer: (i) The concentration of the acid in moldm-3 can be calculated using the formula: concentration (moldm-3) = moles / volume (dm³). Since the moles of acid used are equal to the moles of NaOH, and the volume used is 23.33 cm³, which is equal to 0.02333 dm³, the concentration is: 0.065 mol dm-3. (ii) To calculate the concentration of the acid in gdm-3, we need to convert moles to grams and divide by the volume in dm³. The molar mass of HCl is 1.00 + 35.5 = 36.5 g/mol. The concentration is: (0.065 mol dm-3) * (36.5 g/mol) = 2.3725 g dm-3. (iii) The mass of HCl in 20 cm³ of solution can be calculated by multiplying the concentration in g dm-3 by the volume in dm³: (2.3725 g dm-3) * (0.020 dm³) = 0.04745 g.

Question 2: Qualitative Analysis Experiment

In this experiment, you are given a mixture (F) of two inorganic salts. Perform the following tests and record your observations and inferences:

(a) Add distilled water to F and stir well. Filter the mixture and keep the filtrate and residue.

Observation: Effervescence occurs during the mixing, and a colorless and odorless gas is evolved. The filtrate is pale blue or colorless, while the residue is green.

(b) (i) Add NaOH(aq) in drops to a portion of the filtrate, followed by excess.

Observation: A white precipitate is formed. The precipitate is insoluble in excess NaOH(aq).

Inference: The presence of Ca2+/Pb2+ ions is confirmed. (ii) Add a few drops of HNO3(aq) to another portion of the filtrate, followed by a few drops of AgNO3(aq).

Observation: No visible reaction occurs.

Inference: The absence of Cl- ions is indicated. (c) Add NH3(aq) in drops to a portion of the residue, followed by excess.

Observation: A white gelatinous precipitate is formed. The precipitate dissolves in excess NH3(aq). Inference: The presence of Cu2+ ions is confirmed. (d) (i) Add HNO3(aq) to the residue obtained from 2(c).

Observation: Effervescence occurs, and a colorless and odorless gas is evolved. The gas turns blue litmus paper to red and lime water milky.

Inference: The presence of CO32- ions is indicated. (ii) To distinguish between Zn(OH)2 and Ca(OH)2, which are both white substances, a suitable reagent would be required. The reagent is not specified in the question. Additional

Information: A suitable reagent to distinguish between Zn(OH)2 and Ca(OH)2 is NaOH(aq). Zn(OH)2 is insoluble in excess NaOH(aq), while Ca(OH)2 dissolves to form a clear solution.

Question 3: Observations in Laboratory Reactions

Predict the observations for the following reactions in the laboratory:

(i) Methyl orange is dropped into a solution of lime juice.

Answer: The solution of lime juice will turn pink or red.

(ii) Hydrogen sulphide gas is bubbled through iron (III) chloride solution. Answer: The iron

(III) chloride solution will change color from brown to green, and a yellow deposit may form.

(iii) Sulphur (IV) oxide gas is bubbled into an acidified solution of KMnO4. Answer: The purple color of the KMnO4 solution will turn colorless or decolorized.

(iv) Ethanoic acid is added to a solution of K2CO3. Answer: Bubbling of effervescence will occur, and a colorless, odorless gas will be evolved.

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