Natasha

**Activity One** On [|this site], you will find information about pH and the pH scale.
 * 1) What do the letters pH mean?p=potential and h= Hydrogen
 * 2) On the pH scale, how much difference is there between units (for example, between a pH of 5 and 6)? tenfold change
 * 3) What material is used to measure pH? litmus paper
 * 4) What is the normal pH of rainwater? 5.6

Click on to the[| Miami Museum of Science site] to find out all about pH.

What do the letters pH stand for? What does the pH scale measure? Discover the answers to these and other questions on the [|Chem4kids] site.
 * 1) What makes a substance either acidic or basic?base= OH-ions and acids=H+ ions
 * 2) On the pH scale, where would acids be found?below 7
 * 3) Where on the pH scale would bases be found?above 7
 * 4) What characteristics describe acids? conducts electricity, corrosive, sour taste
 * 5) What characteristics describe bases?conducts electricity, corrosive slippery,and bitter taste
 * 6) What would a pH of 7 indicate? water
 * 7) Take the quiz on acids and bases (link found at the bottom of the page).

[|This website] contains basic information written in a language that is easy to understand. Be sure to visit all links within this website.
 * 1) In what kinds of fields (or industries) would it be necessary to measure pH?
 * 2) What is the pH of blood? Is this acidic or basic? 7.5;basic
 * 3) Is an apple acidic or basic? How do you know?basic; has a pH of 8.0
 * 4) What is the pH of tears? How does this compare to blood pH? 7.5; it has the same pH number
 * 5) What is the pH of coffee?4.0
 * 6) What is the pH of stomach fluids? Does this surprise you?
 * 7) Which substance on this scale has the lowest pH? Is this surprising to you?
 * 8) Which substance on this scale is closest to neutral?
 * 9) If distilled water has no ions at all, what would its pH probably be?