A chemist pours 1 mol of zinc granules into one beaker and 1 mol of zinc chloride powder into another beaker. What do the two sa
2 answers:
Answer:
Both of them have 1 mole of zinc.
Explanation:
Hello,
In this case, if we analyze these two situations via stoichiometry, we are going to realize there is 1 mol of zinc in both of them as shown below:
This is substantiated by knowing there is only one zinc atom in the zinc chloride, therefore, one mole is found as well as in the zinc granules which is just pure zinc.
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pH of 0.048 M HClO is 4.35.
<u>Explanation:</u>
HClO is a weak acid and it is dissociated as,
HClO ⇄ H⁺ + ClO⁻
We can write the equilibrium expression as,
Ka =
Ka = 4.0 × 10⁻⁸ M
4.0 × 10⁻⁸ M =
Now we can find x by rewriting the equation as,
x² = 4.0 × 10⁻⁸ × 0.048
= 1.92 × 10⁻⁹
Taking sqrt on both sides, we will get,
x = [H⁺] = 4.38 × 10⁻⁵
pH = -log₁₀[H⁺]
= - log₁₀[ 4.38 × 10⁻⁵]
= 4.35