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3821

Vinegar is an aqueous solution of?

  • A. Hydrochloric acid
  • B. ethanedioc acid
  • C. ethanoic acid
  • D. hydrofluoric acid
View Answer & Discuss WAEC 2019
3822

which of the following solutions containing one mole per dm\(^3\) of the compound would have the lowest PH?

  • A. ethanoic acid
  • B. hydrochloric acid
  • C. sodium chloride
  • D. sodium hydrogentrioxocarbonate(iv)
View Answer & Discuss (2) WAEC 2019
3823

A sample of air was bubbled into water. The PH of the water slowly changed from 7 to 6. Which of the following gases in the samples caused the change?

  • A. carbon(iv)oxide
  • B. carbon(ii)oxide
  • C. nitrogen
  • D. oxygen
View Answer & Discuss WAEC 2019
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3824

The most suitable indicator for the reaction between NaOH and HCOOH is?

  • A. bromocresol
  • B. methyl orange
  • C. methyl red
  • D. phenolphthalein
View Answer & Discuss (2) WAEC 2019
3825

consider the following reaction equation: 2Al(OH)\(_3\) + 3H\(_2\)SO\(_4\) Al\(_2\)(SO4)\(_3\)(aq)+6H\(_2\)O. How many moles of tetraoxosulphate(vi)acid is needed to produce 0.5mol of aluminium tetraoxosulphate(vi)?

  • A. 0.5
  • B. 1.0
  • C. 1.5
  • D. 3.0
View Answer & Discuss (3) WAEC 2019
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