3G chem PP3 july 2017 QUESTIONS.docx -...

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Name………………………………………………………. Index No…………………/……. School……………………………………………………… Date ……………… Candidate’s Signature………… 233/3 CHEMISTRY Paper 3 JULY 2017 Time: 2 ¼ Hours 3G JOINT EVALUATION TEST– 2017 Kenya Certificate of Secondary Education (K.C.S.E) INSTRUCTIONS TO CANDIDATES 1. Write your name and index number in the spaces provided above. 2. Sign and write the date of the examination in space provided. 3. Answer ALL the questions in the spaces provided in the question paper. 4. All working MUST be clearly shown where necessary. 5. Mathematical tables and silent electronic calculators may be used. 6. This paper consists of 6 printed pages. Candidates should confirm this. FOR EXAMINER’S USE ONLY This paper consists of 6 printed pages. 1. You are provided with: Magnesium ribbon, solid A 1 QUESTION MAXIMUM SCORE CANDIDATE’S SCORE 1 21 2 13 3 6 TOTAL SCORE 40
0.7M hydrochloric acid, solution B 0.3M sodium hydroxide, solution C Distilled water You are required to determine the: (i) the temperature change when magnesium reacts with excess hydrochloric acid (ii) number of moles of hydrochloric acid that remained unreacted (iii) number of moles of magnesium that reacted

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