Three unknown acid solutions are labeled A, B, and C. One is sulfuric acid, one is hydrochloric acid, and the other s nitric acid. Each has a concentration of approximately one molar. Using only aqueous regents of 0.20 M lead (II) nitrate and 0.50 M calcium nitrate, write a short, concise experimental procedure, the results of which will be sufficient to identify each of the unknown acids. Tell what you would expect to see and what it means. Write net ionic equations to illustrate your answer.

what are the two models

explanation:

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

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