1.) Fluorite has a glassy luster and a white streak. It's an inorganic solid with a chemical formula of CaF2 CaF2

Chemistry

2 answers:

Nesterboy [21]3 years ago

8 0

Answer:

D. All of the above

Explanation:

Musya8 [376]3 years ago

6 0

Answer:

D. All of the above

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Hypothesis for does water with salt boil faster than plain water

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Which chemical change ? A.boiling B.freezing C.burning D.melting

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To indicate the pH of a substance, one can use a dye that is both an acid and that appears as different colors in its protonated

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Answer:

<em>The pH of the solution is 7.8</em>

Explanation:

The concentration of the solution is 0.001M and the dye could be in its protonated and deprotonated forms. If the concentration of the protonated form [HA] is 0.0002 M the concentration of the deprotonated form will be the subtraction between the concentration of the bye and the concentration of the protonated form:

[A-] = 0.001M - 0.0002M = 0.0008M

Also, the Henderson-Hasselbalch equation is

$pH = pKa + Log \frac{[A^{-}]}{[HA]}$

this equation shows the dependency between the pH of the solution, the pKa and the concentration of the protonated and deprotonated forms. Thus, replacing in the equation

$pH = 7.2 + Log \frac{0.0008M}{0.0002M} = 7.8$