During lab, students mixed two solutions of soluble ions in a ceramic well to de
ID: 482279 • Letter: D
Question
During lab, students mixed two solutions of soluble ions in a ceramic well to determine if a precipitate forms. Write the dissolution reaction for the ionic solids below. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.) (a) Ca(NO3)2 (b) NaOH. The two solutions, when mixed, will have two cations and two anions. (c) Based on your lab results, enter the cation and anion for which a precipitate will form. (Separate substances in a list with a comma.) (d) Write the net precipitation reaction that occurs. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.)
Explanation / Answer
Ca(NO3)2(aq) + 2NaOH(aq) ----------> Ca(OH)2(s) + 2NaNO3(aq)
Ca+2 (aq) + 2NO3- (aq) + 2Na+ (aq) + 2OH- (aq) ---------------> Ca(OH)2(s) + 2NaNO3(aq)
Removal of spectator ions to get net ionic equation
Ca+2 (aq) + 2OH- (aq) ---------------> Ca(OH)2(s) net precipitation reaction
Ca+2 (aq), OH- (aq) form precipitate