<p>Chapter 9</p><p>1. Describe two properties of an acid and a base.</p><p>Acid: sour taste, are electrolytes, turn litmus paper red, neutralize bases, produce H+ ions in water Base: bitter taste, are electrolytes, turn litmus paper blue, neutralize acids, produce OH ions in water</p><p>2. Where would a 1.00x10-10 molar concentration be on pH scale?</p><p>+ -10 [H3O ] = 1 x 10 M so pH = 10, basic</p><p>3. Label each of the following substances as acidic or basic:</p><p> a. vinegar, acidic b. citrus fruit, acidic c. aspirin, acidic d. black coffee, acidic</p><p>4. If the pH is 8, what is the molar concentration?</p><p>+ -8 pH = 8 so [H3O ] = 1 x 10 M</p><p>5. Indicate which of the following is a property of an acid and which is a property of a base: a. Sour taste, acid b. Bitter taste, base c. Slippery feeling, base d. Changes color of red litmus to blue, base e. Changes color of blue litmus to red, acid</p><p>6. If the concentration of solution is 1.00x10-12 M, what is the pH of the solution?</p><p>+ -12 [H3O ] = 1 x 10 M so pH = 12, basic</p><p>7. What is the equation for the reaction between Tums, CaCO3(aq), and the HCl(aq) in stomach acid?</p><p>CaCO3(aq) + 2HCl(aq) ------> CaCl2 + H2CO3 </p><p>8. Write the names of the following compounds:</p><p> a. HBr, hydrogen bromide (acid) b. Ca(OH)2, calcium hydroxide (base) c. H2SO4, sulfuric acid (acid) d. KOH, potassium hydroxide (base)</p><p>9. How many moles of HCl are dissolved in 200 ml of 0.100 M HCl?</p><p>0.100mol/L = M; L = 200mL x 1L/1000mL = 0.200L M = mol/L so mol = M x L; mol = 0.100mol/L x 0.200L = 0.0200mol</p><p>10. What is the molarity of the solutions formed when the following are dissolved to make 1.0L of solution? a. 5.0 g of HCl</p><p>M = mol/L; grams x FW = mol; 5.0g HCl x 1mol/36g = 0.139mol HCl M = 0.139mol HCl/1.0L = 0.139M</p><p> b. 40.0 g of NaOH</p><p>M = mol/L; grams x FW = mol; 40.0g NaOH x 1mol/40g = 1mol NaOH M = 1mol NaOH/1.0L = 1.0M</p>