Test: AP Chemistry

1.

During lab you have a solution of 1M NaCl at room temperature. You accidentally add so much salt to the solution that you still see some at the bottom of the beaker no matter how vigorously you mix it. What conclusion can you arrive at based upon your knowledge of chemistry? 

The saturation limit of the water for sodium chloride has been surpassed. This is a unsaturated solution. 

The sodium chloride that sank to the bottom is a special isotope that can't be solubilized. 

The salt you spilled into the solution wasn't sodium chloride, but was magnesium chloride, which isn't soluble in water. 

The saturation limit of the water for sodium chloride has been surpassed. This is a saturated solution. 

The large spill caused hydrophobic clusters of sodium chloride to form, preventing them from being dissolved. 

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