Chemistry, 08.04.2020 04:25 kob3965

Gastric juice (pH 1.5) is produced by pumping HCl from blood plasma (pH 7.4) into the stomach. Calculate the amount of free energy required to concentrate the H in 1 liter of gastric juice at 37 degree of centigrade. Under cellular conditions, how many moles of ATP must be hydrolyzed to provide this amount of free energy

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Answer from: mathfan5049

Given question is incomplete. The complete question is as follows.

Gastric juice (pH 1.5) is produced by pumping HCl from blood plasma (pH 7.4) into the stomach. Calculate the amount of free energy required to concentrate the H in 1 liter of gastric juice at 37 degree of centigrade. Under cellular conditions, how many moles of ATP must be hydrolyzed to provide this amount of free energy? the free energy change for ATP hydrolysis under cellular conditions is about -58 kJ/mol. Ignore the effects of the transmembrane electrical potential.

Explanation:

The given data is as follows.

Gastric juice pH = 1.5, blood plasma pH = 7.4

Temperature = $37^{o}C$ = (37 + 273) K

= 310 K

Now, relation between pH and concentration of hydrogen ions is as follows.

pH = $-log [H^{+}]$

At pH = 1.5, we will calculate the $[H^{+}]$ as follows.

$[H^{+}] = 10^{-pH}$

= $10^{-1.5}$

= $3.16 \times 10^{-2}$ M ( $C_{2}$ )

At pH = 7.4, we will calculate the $[H^{+}]$ as follows.

$[H^{+}] = 10^{-pH}$

= $10^{-7.4}$

= $3.98 \times 10^{-8}$ M ( $C_{1}$ )

Also,

$\Delta G_{f} = RT ln (\frac{C_{2}}{C_{1}})$

= $8.314 \times 310 \times ln (\frac{3.16 \times 10^{-2}}{3.98 \times 10^{-8}})$

= 35 kJ/mol

So, the amount of ATP necessary to provide 35 kJ is as follows.

$\frac{35 kJ}{58 kJ/mol}$

= 0.6 mol

Therefore, we can conclude that 0.6 moles of ATP must be hydrolyzed to provide this amount of free energy.

Answer from: Quest

answer: e. sour taste

explanation: acids are those substances which dissociates in water to give $h^+$ ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

$hcl\rightarrow h^++cl^-$

bases are those substances which dissociates in water to give $oh^-$ ions or accepts $h^+$ ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

$naoh\rightarrow na^++oh^-$

$nh_3+h^+\rightarrow nh_4^+$

Answer from: Quest

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

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Gastric juice (pH 1.5) is produced by pumping HCl from blood plasma (pH 7.4) into the stomach. Calcu...

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