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3 years ago

A color change happens during an experiment mixing two liquids. Is this a physical change or chemical change?

2 answers:

6 0

C. because a color change can occur due to chemicals mixing, but it can also be a physical change because you can see it happen with your eyes.

Alborosie3 years ago

4 0

Answer: Option (c) is the correct answer.

Explanation:

When there will be no change in chemical composition of a substance then it is known as a physical change.

For example, when ink diffuses in water then it is a physical change because no new product has formed but a color change has taken place.

On the other hand, when there occurs change in chemical composition of a substance then it is known as a chemical change.

For example, formation of carbon dioxide gas from carbon and oxygen atom is a chemical change.

In a chemical change, color change may or may not happen as it depends on the reactivity of combining substances.

Thus, we can conclude that the statement a color change can be from a physical change or chemical change, is true.

Read more on Brainly.com - brainly.com/question/1736790#readmore

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How many grams of hydrogen gas get produced if 10 g of aluminum reacts?

Degger [83]

Answer:

9.8

Explanation:

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2 years ago

Which of the following produces a physical change in the shape of an object?

bogdanovich [222]

Answer:Any change that occurs without altering the chemical composition of a substance is a physical change. Physical changes can include changing the color, shape, state of matter, or volume of a substance. It is crucial to remember that physical changes never alter the chemical makeup.

Explanation:

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2 years ago

(a) Given that Ka for acetic acid is 1.8 X 10^-5 and that for hypochlorous acid is 3.0 X 10^-8, which is the stronger acid? (b)

Gala2k [10]

Answer:

HOAc is stronger acid than HClO

ClO⁻ is stronger conjugate base than OAc⁻

Kb(OAc⁻) = 5.5 x 10⁻¹⁰

Kb(ClO⁻) = 3.3 x 10⁻⁷

Explanation:

Assume 0.10M HOAc => H⁺ + OAc⁻ with Ka = 1.8 x 10⁻⁵

=> [H⁺] = √Ka·[Acid] =√(1.8 x 10⁻⁵)(0.10) M = 1.3 x 10⁻³M H⁺

Assume 0.10M HClO => H⁺ + ClO⁻ with Ka = 3 x 10⁻⁸

=> [H⁺] = √(3 x 10⁻⁸)(0.10)M = 5.47 x 10⁻⁵M H⁺

HOAc delivers more H⁺ than HClO and is more acidic.

Kb = Kw/Ka, Kw = 1 x 10⁻¹⁴

Kb(OAc⁻) = 5.5 x 10⁻¹⁰

Kb(ClO⁻) = 3.3 x 10⁻⁷

4 0

2 years ago

Calculate the p value of each ion indicated:

Nataliya [291]

27/208 = normality

12 x 10^-2 approx = normality

nw Ka = 14.3 x 10^-3

pKa = 3 - log 14

now, after getting the pKa put it in formula :
pH = pKa + log concn of ion/concn of salt and you'll get it

hope this helps

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2 years ago

Josie created a Venn Diagram to determine the differences and similarities between weather and climate. PLSSS HELP I HAVE 15 MIN

DENIUS [597]

Answer:

Climate is long time intervals and weather is short time intervals

Explanation:

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2 years ago