A solution contains 1.43×10-2 M sodium sulfite and 6.28×10-3 M potassium sulfate.
Solid barium nitrate is added slowly to this mixture.

What is the concentration of sulfate ion when sulfite ion begins to precipitate?
[sulfate] = ___ M

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.