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3 years ago

EXPERIMENT: USING THE TYNDALL EFFECT TO IDENTIFY COLLOIDS

2 answers:

5 0

What did you observe?

When the mixture of Jell-O is shined with the light you observe that the mixture becomes opaque or misty.

In the other two glasses the mixture remains clear

The Jell-O mixture dispereses the light while the other two glasses let the light pass through them.

What is the Tyndall effect?

The Tyndall effect is the dispersion of light by colloid particles. This happens becasue colloid particles present in the mixture are bigger than solvated particles.

Colloid particles are so small that they cannot be in the mixture, but are big enough to disperse the light.

Which glass displayed the Tyndall effect?

The glass with the Jell-O displayed the Tyndall effect.

What does that tell you about the substance in the glass?

The mixture of this glass is a colloid, because they are the only mixtures that may look clear but becomes misty when the light passes trhough them.

Which glass represents a pure substance?

Only the glass with pure water represents a pure substance, one of the glasses that did not disperse the light.

Which glass represents a solution?

The other glass that did not disperse the light is a solution.

Pure substances and solutions do not disperese water. Diluted coloids look clear but disperse light.

Alexxandr [17]3 years ago

4 0

What did you observe?

When the mixture of Jell-O is shined with the light you observe that the mixture becomes opaque or misty.

In the other two glasses the mixture remains clear

The Jell-O mixture dispereses the light while the other two glasses let the light pass through them.

What is the Tyndall effect?

The Tyndall effect is the dispersion of light by colloid particles. This happens becasue colloid particles present in the mixture are bigger than solvated particles.

Colloid particles are so small that they cannot be in the mixture, but are big enough to disperse the light.

Which glass displayed the Tyndall effect?

The glass with the Jell-O displayed the Tyndall effect.

What does that tell you about the substance in the glass?

The mixture of this glass is a colloid, because they are the only mixtures that may look clear but becomes misty when the light passes trhough them.

Which glass represents a pure substance?

Only the glass with pure water represents a pure substance, one of the glasses that did not disperse the light.

Which glass represents a solution?

The other glass that did not disperse the light is a solution.

Pure substances and solutions do not disperese water. Diluted coloids look clear but disperse light.

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ivolga24 [154]

Answer:

The relation between the shielding and effective nuclear charge is given as

$Z_{eff} = Z -S$

where s denote shielding

z_{eff} denote effective nuclear charge

Z - atomic number

Explanation:

shielding is referred to as the repulsion of an outermost electron to the pull of electron from valence shell. Higher the electron in valence shell higher will be the shielding effects.

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The relation between the shielding and the effective nuclear charge is given as

$Z_{eff} = Z -S$

wheres denote shielding

z_{eff} denote effective nuclear charge

Z - atomic number

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7.02 x 10^23 molecules of X2, a ssubstance consisting of diatomic molecules, has a mass of 296 grams. Determine the atomic weigh

Fiesta28 [93]

Answer:

d. 127 g/mol.

Explanation:

Hello!

In this case, since we have the amount of molecules of this this compound, we are able to compute the moles out there by using the Avogadro's number:

$mol=7.02x10^{23}molec*\frac{1mol}{6.022x10^{23}molec}=1.17mol$

Which correspond to the moles of X2. Then, by using the mass we are able to compute the molar mass of X2:

$MM=\frac{296g}{1.17mol}\\\\MM=254g/mol$

It means that the atomic mass of X halves the molar mass of X2, which is then d. 127 g/mol.

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g Where, approximately, is the negative pole on each of these molecules? Lewis structure for C O F 2. A central C atom is single

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The molecule with higher dipole moment is COFH because the geometry of the molecule in the COF2 nearly cancel the dipolar moment of each other. To be more clear:

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COFH has a trigonal structure but differs from COF2 because there is an hydrogen who is donating it's electronic density, so in this zone the electronic density is less than over oxygen or fluor. That makes bond angles be different between them.

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