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butalik [34]
3 years ago
12

The indicator phenolphthalein is added to the _____________.

Chemistry
1 answer:
bonufazy [111]2 years ago
6 0

The indicator, phenolphthalein is added to the analyte  as an indicator in acid–base titrations.

Phenolphthalein is a color changing  indicator for acid base titrations.

Titration is a quantitative  technique used to find  concentration of an unknown solution(analyte ) from a solution of known concentration. which is the titrant.

Now the procedure is set up that, the titrant  is in the  burette and  added to the analyte with known volume)in a conical flask in the presence of an indicator till the endpoint of the reaction.

This  is marked  by a sharp change of color to explain the point when the titrant neutralizes the analyte solution.(phenolphthalein is colorless in acidic solutions but turns pink in basic solutions).

See more here:brainly.com/question/22790616

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How many moles of hydrogen ions are formed in the ionization of 0.250 moles of H2SO4?
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Answer:

The ionization of 0.250 moles of H₂SO₄ will produce 0.5 moles of H⁺ (hydrogen ion)

Explanation:

From the ionization of H₂SO₄, we have

H₂SO₄ → 2H⁺ + SO₄²⁻

Hence, at 100% yield, one mole of H₂SO₄ produces two moles of H⁺ (hydrogen ion) and one mole of SO₄²⁻ (sulphate ion), therefore, 0.250 moles of H₂SO₄ will produce 2×0.250 moles of H⁺ (hydrogen ion) or 0.5 moles of H⁺ (hydrogen ion) and 0.25 moles of SO₄²⁻ (sulphate ion).

That is; 0.250·H₂SO₄ → 0.5·H⁺ + 0.250·SO₄²⁻.

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Hello there!

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