NaOH was dissolved in MgCl2, the color turned dark pink (from white). Then HCl was added and the color changed back to white.
Now I have question:
The reaction you observed was Mg(OH)2 (s) <=> Mg(aq) ^+ 2 OH^- (aq).
Compare the colors you observed in the experiment and answer these questions:
A. Which way should the equilibrium shift when HCl is added? How do your results support your answer?
B. Which way should the equilibrium shift when Na2EDTA is added? How do your results support your answer?
C. Is this reaction endothermic or exothermic? How do you know?