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3 years ago

What is another name for the representative elements?

Chemistry

2 answers:

jeka943 years ago

6 0

Answer:

Group A elements or the main group

Another name for the representative elements are the Group A elements or the main group elements

Explanation:

GaryK [48]3 years ago

5 0

Answer:

Another name for the representative elements are the Group A elements or the main group elements.

Explanation:

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A buffer solution is composed of 1.00 mol of acid and 2.25 mol of the conjugate base. If the p K a of the acid is 4.90 , what is

Gemiola [76]

<u>Answer:</u> The pH of the buffer is 5.25

<u>Explanation:</u>

Let the volume of buffer solution be V

We know that:

$\text{Molarity}=\frac{\text{Moles of solute}}{\text{Volume of solution}}$

To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:

$pH=pK_a+\log(\frac{[\text{conjugate base}]}{[acid]})$

We are given:

$pK_a$ = negative logarithm of acid dissociation constant of weak acid = 4.90

$[\text{conjugate base}]=\frac{2.25}{V}$

$[acid]=\frac{1.00}{V}$

pH = ?

Putting values in above equation, we get:

$pH=4.90+\log(\frac{2.25/V}{1.00/V})\\\\pH=5.25$

Hence, the pH of the buffer is 5.25

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3 years ago

For which one of the following molecules is the indicated type of hybridization not appropriate for

Aleksandr [31]

A. BeCl2 sp2

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3 years ago

Is there a way to dissolve more sugar into a solution that it should hold at that temperature? Explain how this is done and what

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The answer is: supersaturated solution.

A supersaturated solution contains more of the dissolved substance than could be dissolved by the solvent under normal circumstances.

A way to dissolve more sugar into a solution is heating a solution.

The more heat is added to a system, the more soluble a substance (in this example sugar) becomes.

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Explanation:

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