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trapecia [35]
4 years ago
9

What color is the 2,6-dichloroindophenol solution in acidic solutions?

Chemistry
1 answer:
ICE Princess25 [194]4 years ago
7 0
DCPIP is a redox dye that starts off blue but will turn reddish-pink in acidic solution.

This chemical is often used in general chemistry experiments with vitamin C (ascorbic acid), which is a good reducing agent. The DCPIP become colorless when it is reduced (remember, it's blue when oxidized).
You might be interested in
What is the pH of the solution formed when 25 mL of 0.173 M NaOH is added to 35 mL of 0.342 M HCl?
Ugo [173]

Answer:

0.89

Explanation:

You are mixing an acid and a base, so there will be a neutralization reaction.

One of the reactants will be in excess, so we must determine its concentration and then calculate the pH.

<em>Moles of NaOH </em>

Moles of NaOH = 25 × 0.173

Moles of NaOH = 4.32 mmol

===============

<em>Moles of HCl </em>

Moles of HCl = 35 × 0.342

Moles of HCl = 12.0 mmol

===============

<em>Amount of excess reactant </em>

              NaOH + HCl ⟶ NaCl +H₂O

<em>n</em>/mmol:   4.32      12.0

The 4.32 mmol of NaOH reacts completely with 4.32 mmol of HCl.

Excess HCl = 12.0 – 4.32

Excess HCl = 7.6 mmol

===============

<em>Concentration of the excess HCl </em>

Total volume = 25 + 35

Total volume = 60 mL

<em>c </em>= millimoles HCl/millilitres HCl

<em>c</em> = 7.6/60

<em>c</em> = 0.13 mol/L

===============

<em>Calculate the pH </em>

The HCl dissociates completely to hydronium ions, so

[H₃O⁺] = 0.13 mol·L⁻¹

pH = -log[H₃O⁺]

pH = -log0.13

pH = 0.89

8 0
4 years ago
When Michelle's blood was tested, the chloride level was 0.45g/dL. what is this value in milliequivalents per liter
sleet_krkn [62]

Answer: 127 m

Explanation:

4500 mg/L . 35.5 g/mol = 127 m

5 0
4 years ago
Where are intramolecular forces found?
pishuonlain [190]

Answer:

Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules. Therefore, you find them between atoms and molecules.

Explanation:

Hope this helps!!

5 star and brainliest?

5 0
4 years ago
Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).
pychu [463]

Answer:

26.110 grams of O2 produced.

Explanation:

Calculate the amount of moles in KClO3 by dividing the amount of grams given by the atomic weight of the substance.

To get the atomic weight: K = 39.098, Cl = 35.45, O = 15.999, and there are 3 molecules of Oxygen, so multiply 15.999 by three.

39.098 + 35.45 + (15.999 * 3) = 122.548.

66.7g / 122.548 atomic mass = 0.544 moles.

The ratio of moles of KClO3 to moles of O2 is 2 to 3.

\frac{2}{3} = \frac{0.544}{y}

Cross multiply to get 1.632 = 2y. Y = 0.816, meaning 0.816 moles of O2 will be produced.

Convert this into grams by multiplying by the atomic weight of O2 (15.999 * 2 = 31.998).

0.816 * 31.998 = 26.110 grams of O2 produced.

3 0
3 years ago
When gases are released from a reaction what type of change has occurred?
umka21 [38]

Answer:

Color Changes. A change in color often indicates a chemical change.

Temperature Changes. Changes in temperature might also indicate a chemical change has occurred.

Precipitates. The formation of a precipitate is a sign that a chemical change has occurred.

Light Emission.

Gas Production.

Explanation:

3 0
3 years ago
Read 2 more answers
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