Chemistry Form Three Mid-Term Exam 2026 – Kakangaga Muslim Sec PDF
Download Chemistry Form Three Mid -Term Exam 2026 – Kakangaga Muslim Secondary for free.
CHEMISTRY FORM THREE MID -TERM EXAMINATIONS 2026 – KAKANGAGA MUSLIM SECONDARY SCHOOL
10. A certain secondary school in Mwanza is experiencing problems with soap not forming lather easily and white scales forming inside electric kettles and water pipes. A laboratory
technician tested the water and found that it contains calcium hydrogencarbonate and magnesium sulfate.
a)i)Identify the types of hardness present in the water.
ii) Explain why soap does not form lather easily in this water.
b)The school decides to soften the water by boiling.
i) Write an equation to show how boiling removes one type of hardness present.
ii) State why boiling cannot remove the other type of hardness.
c) Suggest three suitable methods the school can use to remove the remaining hardness.
11. In many homes and communities, salt is considered a simple and ordinary substance. However, it plays an important role in improving people’s daily lives. By using six points tell the community that salt is not a simple and ordinary substance as they think.
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