The student placed 10 ml of pbcl2 (saturated solution) in the test tube and added a pinch of nacl. a white precipitate of pbcl2 formed. how will this affect the concentration of pb+2?

Concentration of decreases

Explanation:

In a saturated solution of , the following solubility equilibrium exist-

Now, NaCl contains common ion . Therefore, concentration of increases in solution.

But, at a particular temperature, equilibrium constant remain constant. Therefore to keep equilibrium constant same will reacts with excess to decrease concentration of .

Therefore concentration of decreases.

Note: Equilibrium constant for the above equilibrium=

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890