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Question 15

A sample of hard water contains some calcium sulphate and calcium hydrogen carbonate. The total hardness may therefore be removed by

  • A.boiling the water
  • B.adding excess calcium hydroxide
  • C.adding a calculated amount of calcium hydroxide
  • D.adding sodium carbonate
Objective

Question details

Exam body
FUNAAB
Subject
Chemistry
Year
2017/2018
Question no.
#15
Type
Objective
Previous · Q14Consider the reaction represented by the equation N 2 O 4 ----> 2NO 2 (g) Next · Q16 What process would coal undergo to give coal gas, coal tar, ammoniacal liquor…

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