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3 years ago

your teacher wants you to perform an experiment that will demonstrate a chemical property. which experiment should you choose

Chemistry

1 answer:

geniusboy [140]3 years ago

6 0

Answer:

Measure the pH of different household chemicals

Explanation:

To demonstrate a chemical property using an experiment, measuring the pH of different household chemicals will be the best way. The pH is the degree of hydrogen or hydroxyl ion concentration in a solution.

Chemical properties tell us about what a substance can do.

It shows if a substance will react with other substances or not.

Examples are flammability, rusting of iron, precipitation, decomposition of water by electric current e.t.c.

Measuring the pH is a chemical property determination procedure.

The pH points to the degree of acidity or alkalinity of a solution.

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A solution is made by dissolving 23.5 grams of glucose (C6H12O6) in 0.245 kilograms of water. If the molal freezing point consta

aalyn [17]

Answer:

- 0.99 °C ≅ - 1.0 °C.

Explanation:

We can solve this problem using the relation:

ΔTf = (Kf)(m),

where, ΔTf is the depression in the freezing point.

Kf is the molal freezing point depression constant of water = -1.86 °C/m,

m is the molality of the solution (m = moles of solute / kg of solvent = (23.5 g / 180.156 g/mol)/(0.245 kg) = 0.53 m.

∴ ΔTf = (Kf)(m) = (-1.86 °C/m)(0.53 m) = - 0.99 °C ≅ - 1.0 °C.

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3 years ago

Why does waters boiling point decrease with increases in elevation

lesantik [10]

Answer:

Waters' boiling point decreases with increases in elevation because of the atmospheric pressure.

For example, the higher in elevation you are. The lower the atmospheric pressure is. In other words heated water reached boiling point quicker.

3 0

2 years ago

Read 2 more answers

_____________________ held that all matter is made up of four “elements”— earth, air, fire, and water.

Novosadov [1.4K]

Answer:

Democritus

Explanation:

He spoke about matter was made of tiny particles which moved in empty space

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2 years ago

a solution of prepared by dissolving 20.0 brams of mavni fluride (MgF2) in 80.0 of water (H2O). whag is the mole fraction of mag

Serjik [45]

Answer:

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3 years ago

Can you separate cooking oil from a mixture of cooking oil and water by filtering

slega [8]

Yes, they can be separated by using a funnel. In the separating funnel, they are kept for resting. After they are separated they are filtered one by one.

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2 years ago