ipt A wall that was once white is painted black. Which of the following is definitely true of the painted wall? A. Its chemical
2 answers:
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Answer:
The molar concentration of ions in the given amount of sample is
Explanation:
Given that,
Mass of sample = 21.5 g
0.07 % (m/m) of copper (II) sulfate in plant fertilizer
This means that, in 100 g of plant fertilizer, 0.07 g of copper (II) sulfate is present
So, in 20 g of plant fertilizer
, of copper (II) sulfate is present.
To calculate the molarity of solution, we use the equation:
Mass of solute (copper (II) sulfate) = 0.0151 g
Molar mass of copper (II) sulfate = 159.6 g/mol
Volume of solution = 2.0 L
The chemical equation for the ionization of copper (II) sulfate follows:
1 mole of copper (II) sulfate produces 1 mole of copper (II) ions and sulfate ions
Molarity of copper (II) ions =
Hence, the molar concentration of ions in the given amount of sample is