Science Measuring pH
Acid rain
*Any form of precipitation that has a lower pH than normal* Precipitation that's not pure water since it contains CO*2*
Acidosis
Condition for when blood becomes too acidic
Alkalosis
Condition for when blood becomes too basic (aka alkaline)
The pH must be in balance
For the human body to work properly, what must happen?
They change colors at certain pH ranges and they don't give a certain pH number
How do acid-base indicators work?
They are basic and they restore the pH back to normal
How do antacid tablets help with indigestion?
They help digest foods
How do stomach acids help humans?
It provides a precise pH value
How does an electronic pH meter work?
This paper has been infused with several acid-base indicators and turn into different colors depending on the pH of the solution. The color is compared to a reference card that shows the pH
How does universal pH paper work?
Fossil fuels are burned, and they release fuels in the air, such as sulfur oxides and nitrogen oxides. Those chemicals combine with the water in the atmosphere to form sulfuric acid and nitric acid which forms acid rain. It forms acid rain when those chemicals dissolve in precipitation
How is acid rain formed?
An acidic solution
If a solution is 0-6 on the pH scale, what is it?
Neutral
If a solution is 7 on the pH scale, what is it?
Basic
If a solution is 8-14 on the pH scale, what is it?
The environment is within a certain pH range
Plants and animals are healthier when what?
OH- ions; basic
The higher the pH value, the more __________ there are and the more _________ a solution is.
H*3*O+ ions; acidic
The lower the pH value, the more ________ there are and the more __________ the solution will be.
pH
The measure of how acidic or basic a solution is
Pure water, saliva
What are some examples of a neutral solution?
Lemon juice, vinegar, milk, stomach acid, apple juice, and black coffee
What are some examples of acids?
Ammonia, antacid tablets (when dissolved in water), baking soda, hand soap, and drain cleaner
What are some examples of bases?
They help form acid rain
What are the effects of the sulfuric oxides released during a volcanic eruption?
Acid-base indicators (bromthymol blue), universal pH paper, and electronic pH meter
What are three methods used to measure pH?
More H*3*O+ ions than OH-
What does an acid solution have?
The nutrients that the plants need do not dissolve into the water into the soil
What happens when the soil is too acidic or too basic?
*It can damage ecosystems by lowering the pH of bodies of water* It can harm aquatic species and other organisms that rely on water for survival *It can damage leaves of plants* It can lower pH of soil *It can damage buildings and sculptures made of limestone and marble* It damages paint and makes metal corrode faster
What harms can acid rain do?
The pH range is from 7.35 to 7.45
What is normal blood pH?
Somewhere between 5 and 6
What is normal rain pH?
The concentration of hydronium ions/H*3*O+ (hydrogen ion concentration) present in a solution
What is pH a measure of specifically?
About 2.5. It can drop to 1.5 to help digestion
What is the normal stomach pH?
Values ranging from 0 to 14
What the pH scale have?
Difficulty digesting food and low pH
What two factors can lead to indigestion?
The electronic pH meter
Which method of measuring pH is most accurate?
To maintain good health
Why do you need to keep blood in it's normal pH?
Because too acidic or too basic soils cannot provide nutrients the plants need to grow
Why is the pH of soil important?