The chemical equation below represents a reaction at equilibrium in a closed flask CO(g)+3H2 (g) rightleftharpoons CH4 (g)+H 2 O(g)+heat

Which action will cause the reaction to shift to the left ?

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process