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2 years ago

4. What is a homogeneous solution? Give an example.

Chemistry

2 answers:

Gennadij [26K]2 years ago

8 0

Answer:

Homogeneous solutions are solutions with uniform composition and properties throughout the solution.

Explanation:

For example a cup of coffee, perfume, cough syrup, a solution of salt or sugar in water, etc. Heterogeneous solutions are solutions with non-uniform composition and properties throughout the solution.

expeople1 [14]2 years ago

7 0

Answer:

A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. Example: The salt water is homogeneous because the dissolved salt is evenly distributed throughout the entire salt water sample. Another examples are wine, blood, vinegar

Explanation:

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Calculate the [OH-] and the pH of 0.035 M KOH.

DanielleElmas [232]

Answer:

$= 12.54$

OH- concentration 28.84

Explanation:

KOH dissociates into K+ and OH-. The ratio of K+ and OH- ion is 1:1

In any aqueous solution, the H3O+ and OH - must satisfy the following condition -

$[ H_3O^+] [OH^-] = k_w$

$[ H_3O^+] = \frac{k_w}{ [OH^-]}$

$[H_3O^+] = \frac{1 * 10^{-14}}{3.5 *10^{-2}[H_3O^+] = 2.857 * 10^{-13}$ M

pH =

$- log [ H_3O^+]\\- log [2.857 * 10^{-13}]$

$= - [-12.54]\\= 12.54$

pOH $= 14 -$ pH

pOH

$= 14 - 12.54\\= 1.46$

OH concentration $= antilog 1.46$

OH- concentration 28.84

5 0

4 years ago

Which transition in a hydrogen atom would absorb the photon of greatest frequency?1) n = 3 to n = 12) n = 6 to n = 23) n = 2 to

Nata [24]

Answer:

n .= 1 to 4

Explanation:

From the Planck 5

E = hc/lambda

Where lambda is wavelength

E= hf

We will explain the answer here with respect to wavelength. It should be understood that the higher the wavelength of transition, the lower the frequency.

This means that longer transitions will occur at lesser frequencies. From the options the biggest transition is from 2 to 94, while the smallest is from 1 to 4

The transition from 1 to 4 is expected to have the highest energy as it has the shortest wavelength,

Transition from 2 to 94 has the longest wavelength, lowest energy and least frequency

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3 years ago

A student has a rectangular block. It is 2 cm wide. 3 cm tall and 25cm long. It has a mass of 600 g. First, calculate the volume

Klio2033 [76]

Answer:

The area of the block is 150 cm

Explanation:

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3 years ago

What must be conserved in a balanced nuclear equation?

Law Incorporation [45]

There is nothing conserved<span> in this reaction. When writing a β </span>equation<span>, remember that in the nucleus, a neutron ( n ) decays into a proton ( p+ ) and a high energy electron which is known as the beta ( β ) particle. Because a new proton has formed, the atomic number of the original atom will increase by 1</span>

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4 years ago

What are examples of methodological errors in a chemistry lab?

rewona [7]

Answer:

i) Use of wrong Indicator in acid base titration.

ii) Addition of chemicals with improper sequence.

iii) Wrong technique used during chemical reaction.

7 0

4 years ago