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2 years ago

Why is water important to cells

Chemistry

2 answers:

seropon [69]2 years ago

8 0

All cells need them to completly stay alive

Arturiano [62]2 years ago

6 0

Water is often called a solvent because it is key to so many processes where it acts as exactly that, a solvent. It helps to break waste and nutrients down in the cell so that they can be moved through the various membranes and natural filters in the body.

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A weak monoprotic acid is titrated with 0.100 MNaOH. It requires 50.0 mL of the NaOH solution to reach the equivalence point. Af

larisa86 [58]

Explanation:

The given reaction is as follows.

$HA(aq) + NaOH (aq) \rightleftharpoons NaA(aq) + H_{2}O(l)$

Hence, number of moles of NaOH are as follows.

n = $0.05 L \times 0.1 M$

= 0.005 mol

After the addition of 25 ml of base, the pH of a solution is 3.62. Hence, moles of NaOH is 25 ml base are as follows.

n = $0.025 L \times 0.1 M$

= 0.0025 mol

According to ICE table,

$HA(aq) + NaOH (aq) \rightleftharpoons NaA(aq) + H_{2}O(l)$

Initial: 0.005 mol 0.0025 mol 0 0

Change: -0.0025 mol -0.0025 mol +0.0025 mol

Equibm: 0.0025 mol 0 0.0025 mol

Hence, concentrations of HA and NaA are calculated as follows.

[HA] = $\frac{0.0025 mol}{V}$

[NaA] = $\frac{0.0025 mol}{V}$

$[A^{-}] = [NaA] = \frac{0.0025 mol}{V}$

Now, we will calculate the $pK_{a}$ value as follows.

pH = $pK_{a} + log \frac{A^{-}}{HA}$

$pK_{a} = pH - log \frac{[A^{-}]}{[HA]}$

= $3.42 - log \frac{\frac{0.0025 mol}{V}}{\frac{0.0025}{V}}$

= 3.42

Thus, we can conclude that $pK_{a}$ of the weak acid is 3.42.

8 0

2 years ago

A certain metal M forms a soluble sulfate salt MSO, Suppose the left half cell of a galvanic cell apparatus is filled with a 3.0

dimaraw [331]

Explanation:

It is known that for high concentration of $M^{2+}$ , reduction will take place. As, cathode has a positive charge and it will be placed on left hand side.

Now, $E^{o}_{cell}$ = 0 and the general reaction equation is as follows.

$M^{2+} + M \rightarrow M + M^{2+}$

3.00 M n = 2 30 mM

E = $0 - \frac{0.0591}{2} log \frac{50 \times 10^{-3}}{1}$

= $-\frac{0.0591}{2} log (5 \times 10^{-2})$

= 0.038 V

Therefore, we can conclude that voltage shown by the voltmeter is 0.038 V.

5 0

3 years ago

Help anyone? :) please

Elanso [62]

Answer:

6. protons, mass number from the atomic number

7. Li= ,

8 0

2 years ago

Photosynthesis is the chemical process in which plants and other organisms

-Dominant- [34]

Answer:

sugar and oxygen

Explanation:

sugar (glucose) and oxygen

7 0

2 years ago

What is the effect of this

Lina20 [59]

Answer:

Waves transfer energy from one place to another without transferring matter. Wave motion (the movement of waves) can be shown by the vibrations of a spring or by water waves.

<u><em>Hope this helps!! have a good day! :)</em></u>

3 0

2 years ago