21 When aqueous solutions of are mixed, a precipitate forms. a. NiBry and AgNO b

Question

21 When aqueous solutions of are mixed, a precipitate forms. a. NiBry and AgNO b. Nal and KBr c. K SO, and CrC1 d. KOHf and Ba(NO) e. Lico, and C,l 22 The spectator ions in the reaction between aqueous perchloric acid and aqueous barium hydroxide are: a. OH and CIO b. H., OH, CIO, and Ba2. c. H and OH d. H' and Ba e. C1O, and Ba 23 In a titration of 35.00ml of 0.737MSO solution is required for neutralization. ml of 0.827M KOH a. 35.0 b. 1.12 c. 25.8 d. 62.4 e. 39.3 24 What volume (L) of 0.250M HNO, is required to neutralize a solution prepared by dissolving 17.5g of NaOH in 350ml of water? a. 50.0 b. 0.44 c. 1.75 d.0.070 e. 1.75 x 10 All weak electrolytes are: a. salts b. acids. c. bases 25 d. molecular e. tonic. 26 Which ion(s) is/are spectator ions in the formation of a precipitate of AgBr via combining aqueous solutions of CoBr2 and AgNO,? a. Co2+ and NO, b. NO and Br c. Co2+ and Ag+ d. Br e. NOj Aqueous sodium chloride will react with which one of the following in an exchange (metathesis) reaction? a. Calcium nitrate b. postassium bromide c. lead nitrate d. barium nitrate e. sodium chloride

Explanation / Answer

Ans 21 :a) NiBr2 and AgNO3

when the solutions of NiBr2 and AgNO3 are mixed , a precipitate is formed.

The reaction is given as :

NiBr2 (aq) + 2AgNO3 (aq) = 2AgBr (s) + Ni(NO3)2 (aq)

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