answersLogoWhite

0

How does CO2 decrease the pH?

Updated: 8/11/2023
User Avatar

Wiki User

11y ago

Best Answer

Adding water does not always decrease pH. pH is a measure of the concentration of hydrogen ions, also called hydronium ions. They are inversely related. More hydrogen ions means a lower pH.

A base has a pH greater than 7 (neutral) because it has an increased amount of hydroxide ions which causes a lower amount of hydrogen ions. Adding more water to a base solution causes the concentration of the hydroxide ions to become less, thus due to equilibrium, causing the hydrogen ion concentration to increase. This does cause pH to become less ... decrease.

But an acid solution does the exact opposite when water is added. It already has a large concentration of hydrogen ions, but as water is added the concentration decreases and this causes pH to increase.

User Avatar

Wiki User

11y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

9y ago

pH is a measure of the concentration of hydrogen ions in moles per liter. As the concentration of hydrogen ions increases, the pH decreases.

This answer is:
User Avatar

User Avatar

Wiki User

7y ago

Dissolved carbon dioxide form with water the carbonic acid.

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How does CO2 decrease the pH?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

When blood CO2 levels increase does the pH increase or decrease?

It decreases.


What will happen to the amount of CO2 if the pH decreases?

The concentration of carbon dioxide decrease.


Does algae increase pH or decrease pH of water?

Algae draws all available CO2 out of water, causing its pH to increase.


Hyperventilation is most likely to be accompanied by a?

decrease in blood CO2 concentration and a rise in pH


Why pH of fresh ground water slightly decrease upon exposure to air?

It is due to absorption of CO2.


What is the respiratory mechanism of pH control?

The respiratory system helps control the acidity of the blood by regulating the elimination of Carbon Dioxide (CO2) and Water (H2O).These molecules are exhaled with every breath.H2CO3 --> H2O + CO2(carbonic acid)The brain is sensitive to blood CO2 levels and pH.A significant increase in CO2 or decrease below pH 7.38 of arterial blood- causes breathing to increase (in rate and depth)- results in hyperventilation- more CO2 is exhaled- eliminates CO2 - reduces H2CO3 and H+ concentrations- increases pH back to normalA significant decrease in CO2 or increase in pH- causes breathing to decrease- results in hypoventilation- less CO2 is exhaled- increases CO2 - increases H2CO3 and H+ concentrations- decreases pH back to normalRespiratory mechanism (depth and rate of breathing) controls CO2CO2 in solution is an acid.Partial Carbon Dioxide (PaCO2) levels in Arterial Blood Gas (ABG).Higher PaCO2 causes acidosis (lower pH), or neutralizes alkalosis.Lower PaCO2 causes alkalosis (raises pH.), or neutralizes acidosis.


What is the pH of CuO and CO2?

CuO and CO2 (as a dry gas) has not a pH.


What is the effect of hyperventilation on pH?

Blood pH is normally 7.35-7.45. With excess CO2 in the circulatory system, cabonic acid becomes present, which in turn decreases pH of blood. Thus, to return blood pH to a normal level, ventilation is increased to increase oxygen saturation and decrease CO2 saturation, which will then reduce the amount of carbonic acid, which will normalize blood pH.


Will the pH of carbonated drinks increase over time Why?

no, i think pH will decrease with time as the CO2 present in the drink wil be released from the drink and thus the acid content will decrease. no, i think pH will decrease with time as the CO2 present in the drink wil be released from the drink and thus the acid content will decrease.


What is the stimulus to breath for a normal person?

normal people take breaths because of a decrease in their pH. if you hold your breath your co2 levels increase and that triggers your pH to go down, which makes you take a breath.


How does urine pH change for someone who just suffered an asthmatic attack?

Your CO2 builds up as a result of air trapping. CO2 and H2O (which is present throughout your body) make carbonic acid, which causes your pH to decrease (become acidotic). Your kidneys are one of the ways your body maintains its pH. Kidneys use a buffer system to help control pH. They make urine and since you are acidotic at the time of an asthma attack, the pH is decreased.


What was the PH trend seen when adding CO2 to the water sample?

As CO2 is added to water, the pH usually decreases.