Answer:
Fresh lead is a silver-white color, but as time goes by it will lose its shiny surface and become a dull gray color.
4H202->2H2O+O2
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Answer:
Explanation:
Solubility product is defined as the equilibrium constant in which a solid ionic compound is dissolved to produce its ions in solution. It is represented as
The equation for the ionization of the silver chromate is given as:
We are given:
Solubility of = S mol/L
By stoichiometry of the reaction:
1 mole of gives 2 moles of and 1 mole of .
When the solubility of is S moles/liter, then the solubility of will be 2S moles\liter and solubility of will be S moles/liter.
Expression for the equilibrium constant of will be:
Hence, the solubility of is
Answer:
You can increase the validity of an experiment by controlling more variables, improving measurement technique, increasing randomization to reduce sample bias, blinding the experiment, and adding control or placebo groups.