Day 6 pH Scale and Metric Measurements
pH Scale
The pH scale is a way of measuring how many Hydrogen ions (H+) are released when a molecule is dissolved in water (we call a solution of water, aqueous)
An Acid is something that releases H+ ions when it is added to water
A Base is something that releases OH- ions when added to water (Drop the Bass)
Watch this video on the pH scale. Take notes during this video and be prepared to answer simple questions involving pH. Also be ready to discuss the benefits of alkaline water.
Here is a more in depth explanation of pH by Crash Course. This video is optional.
A buffer is something that releases the opposite ion causing the base or acid to become neutralized.
Our body uses many types of buffers. Different parts of our body have a different pH. Although there are different pH's throughout our body, each part must maintain the same pH. To make sure your pH does not change, your body will release buffers.
Hydrophobic-is something that does not mix with water (Afraid of water)
Usually because the molecule has no charge
Hydrophilic- is something that mixes with water (Attracted to water)
Usually because the molecule is polar
Measurements
It is important to mention in all science classes the types of units we will use for measurements.
Scientists all over the world have all agreed to use the same units of measurement in order to avoid accidents like the one with the mars climate satellite.
The universal measurement system is known as the SI Units. SI stands for international system (the S and I are backwards because the french came up with it and they say Le Système international)
Here is a good SI conversion chart to help you with your conversions
The SI system is very similar to the metric system and uses all of the same prefixes for its measurements.
Here is a chart of metric prefixes
