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Goshia [24]
3 years ago
10

Four different solutions (I, II, III, and IV) are labeled on the pH scale below. mc026-1.jpg Why would solution IV be considered

the most concentrated base out of the four substances? It has the highest concentration of hydrogen ions. It has the highest concentration of hydronium ions. It has the highest concentration of oxide ions. It has the highest concentration of hydroxide ions.
Chemistry
2 answers:
pogonyaev3 years ago
4 0
Answer: It has the highest concentration of hydroxide ions.

Explanation:

1) The pH is the measure of the acidity of a solution

2) pH is the logarithm of the inverse of the concentration of hydronium ions.

The higher the concentration of hydronium ions the lower the pH. A low pH indicates a high acidity. A high pH indicates a low acidity.

So, a more concentrated acid is more acid and its pH is lower.

3) The basicity is calculated using the concentration of hydroxide ions. The pOH is the measure of basiciy.

4) pOH is the logarithm of the inverse of the concentration of hydroxide ions.

5) The higher the concentration of hydroxide the lower the pOH and the more basic the solution.

This is, a more concentrated base will be more basic.

So, the only answer possible is that solution IV is considered the most concentrated base out of the four substances because It has the highest concentration of hydroxide ions.


Maksim231197 [3]3 years ago
4 0

Answer:

D

Explanation:

I took the test

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Despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided, you should be
navik [9.2K]

Answer:

G<0, spontanteous

H<0, from equation

S>0, gas to solid

Explanation:

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. Despite its name, silica gel is a solid. It is a chemically inert, highly porous, amorphous form of SiO2. Water vapor readily adsorbs onto the surface of silica gel, so it acts as a desiccant. Despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided, you should be able to make an educated guess about the thermodynamic characteristics of the process. Predict the signs of ΔG, ΔH, and ΔS.

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3 years ago
The enzyme, carbonic anhydrase, is a large zinc-containing protein with a molar mass of 3.00 x10^4 g/mol. Zn is 0.218% by mass o
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The mathematical expression for mass percent is given by:

Mass percent = \frac{mass of the compound}{molar mass of the compound}\times 100

Put the values,

0.218 percent of zinc = \frac{mass of zinc}{3.00 \times 10^{4} g/mol}\times 100

mass of zinc = 0.218 \times (3\times 100) g

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Number of atoms of zinc is calculated by the Avogadro number.

Now, according to mole concept

6.022\times 10^{23} molecules of enzyme consists of 6.022\times 10^{23} atoms of zinc

So, 1 molecule of enzyme contains  =\frac{6.022\times 10^{23}atoms of zinc}{6.022\times 10^{23} }

= 1 atom of zinc.

Hence, every carbonic anhydrase molecule consists of 1 atom of zinc.



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