Question

please answer all questions!

I. Briefly explain what is meant by each of the following terms as it relates to this experiment. (a) Precipitation reaction (b) Spectator ion (c) The designation (ag) following the formula of a compound (d) Decomposition reaction (e) Coefficients II. (a) Write the complete ionic equation for the double displacement reaction that occurs when aqueous solutions of barium nitrate Ba(NO3)2 and sodium chromate Na2Cr04 are mixed. (b) Name the spectator ions in this chemical reaction. (c) Write the net ionic equation for this reaction.

Answer 1

(a) Precipitation Reaction A precipitation Reaction refers to the formation of an insoluble salt are combined The insoluble salt that fall out of solution is known or the precipitate hence the reaction�s name precipitation reaction. (b) spectator ion A spectator ion is an ion that exists in the same form on both the reactant The iron is unchanged not affect the equilibrium 2 Al + 3 cu Cl_2 rightarrow 2 Al Cl_3 + 3 Cu In this reaction Cl^- is a spectator ion it oxidation number does not change so we can write 2Al + 3cu^2 + rightarrow 2 Al^3 + 3 Cu (c) (aq) means compound is soluble in water sol^n (d) Decomposition Reaction: - This are chemical reactions in which a complex molecule breaks down and form simple molecular Decomposition reactions are three type (a) rightarrow Thermal CaCO_3 (s) + heat rightarrow CaO (s) + CO_2 (g) (b) rightarrow Electrolytic 2 H_2 O (l) rightarrow 2 H_2 (g)
​​​​​​