Editing Answers To 2015-2016 Review HW For Acid/Base Test

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Part I 
1. Hydrosulfuric acid, weak 
2. H2Se, weak 
3. Sulfuric acid, strong 
4. H2SO3, weak 
5. Calcium hydroxide, strong 
6. H3PO4, weak 
7. NH3, weak (base) 
8. Carbon dioxide, non-electrolyte 
9. Barium chlorite, strong (ionic compound) 
10. Nitrous acid, weak 
 
Part II 
1. All solution are same molarity so difference are strong and weak and how many H+ ionizes per molecule of acid. HF is weak acid so it has highest pH, and sulfuric acid has 2 H+ per molecule so it has lowest pH. 
 
2. pH indicator indicates a pH (actually a pH range). The weak acid, that is the indicator, changes colors. 
 
3. 2016-2017 students do not do 
 
4. pH = -log [H+] , pH value and [H+] are indirectly proportional. It can be show in the math by the negative sign. 
 
 
Part III 
 
1. pH = 1.988 
 
2. 3.58E-4M 
 
3. pH = 10.73

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