2025-kisii-sch-chemistry-paper-3-marking-scheme
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DATE 07 Dec 2025
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About This Document
Document Type: This is a Solution Set, designed for Verifying answers and correcting mistakes.
Context: Standard material from the 2025 academic period.
Key Content: Likely covers essential definitions, structured questions to test your proficiency.
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Recommendation: comprehensive resource for students aiming to deepen their understanding of General Studies.
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Detailed Summary
FORM FOUR CHEMISTRY PAPER 3 MARKING SCHEME Table 1 Volume of distilled water Temp 0C 4 76 Salability of R in Y/100g of water 125. 66 Table 1 attracts 6marks distributed as follows. (a)Complete table 1mrk ✓ Award 1mrk for 5 – 4 correctly filled. ✓ Award ½Mrk For 3 Correct Readings. ✓ Award 0Mrk for less 3 readings. (b)Accuracy ½mrk ✓ Tied to the 1st temperature. (c) Decimal 1mrk ✓ Accept whole number for temperature readings. ✓ Accept one decimal places of. ✓ Penalize fully for decimal if not consistent. (d) Trend 1mrk ✓ Accent temperature readings drops continuously. ✓ Award ½ mrk if temperature reading all remain constant or rises ✓ Penalize fully if temperature readings all remain constant (e) Solubility calculations CHEMISTRY 232/3 2 ½ mk 1mrk 1 FORM 4 MS ✓ Award 2 ½ marks for calculations of solubility. ✓ Award ½ mark for each correct calculation done. Graph Graph attracts three marks awarded as follows: 7(a) Labeling of axes ½ mrk ✓ Award ½mk for all axes correctly labeled with correct units. ✓ Units may be given on both or not.
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FORM FOUR CHEMISTRY PAPER 3 MARKING SCHEME Table 1 Volume of distilled water Temp 0C 4 76 Salability of R in Y/100g of water 125.00 6 70 83.33 8 59 62.50 10 51 50.00 12 40 41.66 Table 1 attracts 6marks distributed as follows. (a)Complete table 1mrk ✓ Award 1mrk for 5 – 4 correctly filled. ✓ Award ½Mrk For 3 Correct Readings. ✓ Award 0Mrk for less 3 readings. (b)Accuracy ½mrk ✓ Tied to the 1st temperature. ✓ Accept if within +12.00 C of school value. (c) Decimal 1mrk ✓ Accept whole number for tem...
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