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Warm up 9/19 & Lab Turn in* Identify the following symbols & identify whether they are Elements (E) or Compounds (C). N H2O Na K H2SO4 HCl Cl NaCl Write.

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Presentation on theme: "Warm up 9/19 & Lab Turn in* Identify the following symbols & identify whether they are Elements (E) or Compounds (C). N H2O Na K H2SO4 HCl Cl NaCl Write."— Presentation transcript:

1 Warm up 9/19 & Lab Turn in* Identify the following symbols & identify whether they are Elements (E) or Compounds (C). N H2O Na K H2SO4 HCl Cl NaCl Write the equation: H2O+ H+  H3O + What are the products and what are the reactants? *Staple pages and put in basket in rear of classroom.

2 ACIDS, BASES, AND pH pp

3 Water Polar (covalent) compound
Water has a positive (+) and negative (-) “pole” (+) is due to H and (-) is O acts like a magnet with + attracted to – pulls apart molecules like NaCl (ionic bond)

4 Water Bonding covalent bonds hold H2O together
hydrogen bonds hold molecules of H2O Covalent > Hydrogen

5 Acids and Bases H2O = water H+ = hydrogen ion OH- = hydroxide ion

6 Acids and Bases H2O  H+ + OH- H+ reacts with H2O
H2O + H+  H3O+ (hydronium) H3O+ more commonly written as H+

7 Acids Acids: H+ > OH- pH less than 7
Acid Properties: tastes sour, highly corrosive EX. HCl, H2SO4

8 Bases Bases: OH- > H+ pH more than 7
Base Properties: tastes bitter, feel slimy EX. NaOH, Mg(OH)2

9

10 pH power of Hydronium measures acidity (from 0-14) and how much H3O+/H+ is present. The closer to 0, the more the H3O +/H+ 0 up to 7 = acid = neutral over 7 = base/alkaline Can use indicators to tell the pH ( phenol red, pH paper, litmus, BTB)


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