Question 16 (3 marks) (a) Write the word equation for potassium reacting with water forming an aqueous solution. (1 mark) potassium + water â potassium hydroxide + hydrogen (b) Write the balanced formulae equation for (a) including states/phases.(2 marks) 2K (s) + 2H 2 O (l) â 2KOH (aq) + H 2 (g) âº One mark for balanced equation + one mark for correct states.his shows that water is made up of more than one type of atom. (1 mark) âº The two substances obtained were in definite ratio of 2:1 as shown by the 2:1 ratio of the gas volumes. (1 mark) (ii) State another observation that shows that electrolysis is a chemical change.
tr.v. colÂ·latÂ·ed, colÂ·latÂ·ing, colÂ·lates. 1. To examine and compare carefully in order to note points of disagreement. 2. To assemble in proper numerical or logical sequence.
A mixture in which very small particles of one substance are distributed evenly throughout another substance. The particles are generally larger than those in a solution, and smaller than those in a suspension. Paints, milk, and fog are examples of colloids. Compare solution, suspension.