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1. A field geologist carries a dropper bottle of a strong acid, HCI(aq), to help with the identification of samples. A rock is found to give off odorless gas bubbles when a few drops of the acid are added. Which anion is mostly likely in the rock?

2. Two common substances that are used in the northern U.S. to melt snow and ice are sodium choride (rock salt) and calcium chloride. You have a bag of a substance sold as melting salt. Outline a short procedure that will identify if one of these compounds is contained in the bag and, if so, which one.

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