Solubility Rules and Precipitate Formation

Question

Based on general solubility rules, which of the following chemical reactions results in the formation of a precipitate?

Accepted Answer

$$Pb(NO_3)_2 (aq) + 2KI (aq) \rightarrow PbI_2 (s) + 2KNO_3 (aq)$$

Answer

$$NaNO_3 (aq) + KCl (aq) \rightarrow NaCl (aq) + KNO_3 (aq)$$

Answer

$$NH_4Cl (aq) + NaOH (aq) \rightarrow NaCl (aq) + NH_4OH (aq)$$

Answer

$$K_2SO_4 (aq) + NaCl (aq) \rightarrow Na_2SO_4 (aq) + KCl (aq)$$

Rank	User	Correct Count	Attempt Count	Total Time	Score
#1	heodavidheo	3	3	0m 00s	300
#2	kemiaahogytetszik	1	1	0m 00s	100
#3	gultepemesut	1	1	0m 06s	94
#4	Derinchiay2013	1	1	0m 17s	83
#5	27mbull	1	1	0m 22s	78
#6	leeparkunchan	1	1	1m 22s	18
#7	liuqy.rosalynn.0916	1	1	2m 57s	-77

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