A solution contains AgNO3 and Ba(NO3)2. What substance could be added to the solution to precipitate Ag ions, but leave Ba2 ions in solution

A salt containing chloride ions or hydrochloric acid.

Explanation:

Hello,

In this case, by adding a chloride-based salt or hydrochloric acid, precipitation of silver chloride could be attained by cause of its neglectable solubility in water as shown below:

Moreover, barium chloride is highly soluble in water, for that reason it remains in aqueous solution as specified:

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a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.