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2 years ago

If you have a saturated solution at equilibrium, what changes could you make to increase the solubility of the compound?.

Chemistry

1 answer:

Elza [17]2 years ago

3 0

1. A colloid may look homogeneous from the outside, but is a heterogeneous mixture.

2. Diameter of the particles of colloids ranges between 1-100 nm.

3. Tyndall effect is observed in colloids if a light beam passes through it. Solution with large solute particles, which are intermediate in diameter between those in correct solutions and those in suspensions are defined as colloids.

Explanation

Characteristics of colloids:

The size of particles in a colloid is greater than those in a correct solution but lesser than those in a suspension. The diameter of a colloid particle lies between 1 nm and 100 nm.

A colloid is a heterogeneous mixture of dispersed phase and dispersed medium. For example, butter is a colloid in which tiny fat droplets stay dispersed in a liquid to form an emulsion.

Special techniques like centrifugation apply to separate colloid particles. The filtration process is useless in separating the constituents of a colloid.

The particles of a colloid are so large that they can scatter a beam of light passing through it. This is known as Tyndall effect.

Colloid particles do not aggregate at the bottom of the vessel if the solution is left undisturbed.

1. A colloid may look homogeneous from the outside, but a heterogeneous mixture.

2. Diameter of the particles of colloids ranges between 1-100 nm.

3. Tyndall effect is observed in colloids if a light beam passes through

A solution with large solute particles, which are intermediate in diameter between those in correct solutions and those in suspensions, are defined as colloids.

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A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate proteins. After centrifugation, the resulting sol

Anarel [89]

Explanation:

According to the Beer-lambert' s law,

Absrobance = absrobptitvity × lenght × concentration

So, if we will plot a graph between absrobance and concentration then we will obtain a straight line

Hence, formula to calculate slope of the graph is as follows.

The slope of graph = $\frac{\text{difference in absrobance at two points}}{\text{difference in concentrations at those points}}$

The given data is as follows.

$A_{1}$ = 0.412 (first point)

$A_{2}$ = 0.642 (second point)

$C_{1}$ = 0.240 ppm (first point)

$C_{2}$ = 0.475 ppm (second point)

Hence, putting these values into the above formula we will calculate the value of slope as follows.

Slope = $\frac{\text{difference in absrobance at two points}}{\text{difference in concentrations at those points}}$

= $\frac{0.642 - 0.412}{0.475 - 0.240}$

= $\frac{0.23}{0.235}$

= 0.978

It is known that for the graph, line equation can be written as follows.

y = mx + c ........... (1)

where, C = intercept

m = slope

Hence, calculate the value of intercept as follows.

0.412 = $0.24 \times 0.978$ + c

c = 0.178

As it is given that the absorbance values 0.454 (the y-axis value). Therefore, putting this value into equation (1) we get the following.

y = mx + c

0.454 = $x \times 0.978$ + 0.178

0.276 = 0.978x

x = 0.282 ppm

Thus, we can conclude that the concentration of Pb in the given sample is 0.282 ppm.

3 0

3 years ago

Which of the following reactions is a synthesis reaction?

Vedmedyk [2.9K]

<h3>Answer:</h3>

B) 4H₂(g) + O₂(g) ⟶ 2H₂O(l)

<h3>Explanation:</h3>

Chemical reactions occur when compounds or elements combine to form new compounds or other elements.
Chemical reactions may be classified into various types which include synthesis reactions, replacement reaction, decomposition reactions, and precipitation reactions among others.
In our case, we were supposed to identify a synthesis reaction.
Thus, we need to know what is a synthesis reaction.
A synthesis reaction is a reaction that occurs when two elements or small compounds combine to generate a large compound.
In this case, B is the choice that shows a synthesis reaction where hydrogen gas combines with oxygen gas to yield water.

5 0

3 years ago

Calculate the Ka for the following acid. Determine if it is a strong or weak acid.

vladimir1956 [14]

Answer:

a) Ka= 7.1 × 10⁻⁴; This is a weak acid because the acid is not completely dissociated in solution.

Explanation:

Step 1: Write the dissociation reaction for nitrous acid

HNO₂(aq) ⇄ H⁺(aq) and NO₂⁻(aq)

Step 2: Calculate the acid dissociation constant

Ka = [H⁺] × [NO₂⁻] / [HNO₂]

Ka = 0.022 × 0.022 / 0.68

Ka = 7.1 × 10⁻⁴

Step 3: Determine the strength of the acid

Since Ka is very small, nitrous acid is a weak acid, not completely dissociated in solution.

4 0

3 years ago

What caused wind to blow

Arlecino [84]

Answer:

Different atmospheric pressure. When there is a different atmospheric pressure, air moves from the higher pressure to the lower pressure area which results in what you call <u>WIND</u> but can result in various speeds and pressure.

Hope this helped and if it did, please give my answer a brainliest.

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How is the periodic table important for all of science and not just chemistry? pleas answer me

valentina_108 [34]

<em>The periodic table helps people understand what a substance's atoms can contain, which also provides information on how it can perform a specific action, or how well it can act as a base and so on. When people understand what something is made of, we can figure out what it can be used for. This makes it easier for workers to construct important structures.</em>

<em>Hope this helps and have a nice day.</em>

<em>-Sayonara</em>

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3 years ago

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