Lab 4: Acids and Bases
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UMUC NSCI 101/103
Lab 4: Acids and Bases
INSTRUCTIONS:
· On your own and without assistance, complete this Lab 4 Answer Form and submit it via the Assignments Folder by the date listed on your Course Schedule (under Syllabus).
· To conduct your laboratory exercises, use the Laboratory Manual that is available in the classroom. Laboratory exercises on your CD may not be updated.
· Save your Lab 4 Answer Form in the following format: LastName_Lab4 (e.g., Smith_Lab4).
· Submit your document in a Word (.doc or .docx) or Rich Text Format (.rtf) for best compatibility.
Pre-Lab Questions:
1. What is a neutralization reaction?
2. Hydrochloric acid (HCl) is a strong acid. About what pH would you expect it to be?
2. Sodium hydroxide (NaOH) is a strong base. About what pH would you expect it to be?
Experiment 1: Acidity of Common Household Products
Table 2: Acid-Base Neutralization for Part 1, Steps 5 & 6
| Test tube 1 | Test tube 2 | Standard | |
| Step 1 | Add acid | Add base | Neutral |
| Color | |||
| pH value |
Table 3: Acid-Base Neutralization for Part 1, Steps 8 & 9
| Test tube 1 | Test tube 2 | Standard | |
| Step 1 | Add base | Add acid | Neutral |
| Color | |||
| pH value |
Table 4: Acidity and Alkalinity Testing for Household Products Data
| Product | Hypothesized pH | Color of Litmus Paper | Color of pH Paper | Actual pH |
Questions
1. Why did the grape juice change color when an acid or base was added?
2. You added a base, sodium bicarbonate, to test tube 1 that contained citric acid and an acid to test tube 2 that contained base. Why did the grape juice return to its original color?
3. Name 2 acids and 2 bases you often use.
TYPE YOUR FULL NAME:
INSTRUCTIONS:
· On your own and without assistance, complete this Lab 4 Answer Form and submit it via the Assignments Folder by the date listed on your Course Schedule (under Syllabus).
· To conduct your laboratory exercises, use the Laboratory Manual that is available in the classroom. Laboratory exercises on your CD may not be updated.
· Save your Lab 4 Answer Form in the following format: LastName_Lab4 (e.g., Smith_Lab4).
· Submit your document in a Word (.doc or .docx) or Rich Text Format (.rtf) for best compatibility.
Pre-Lab Questions:
- What is a neutralization reaction?
- Hydrochloric acid (HCl) is a strong acid. About what pH would you expect it to be?
- Sodium hydroxide (NaOH) is a strong base. About what pH would you expect it to be?
Experiment 1: Acidity of Common Household Products
Table 2: Acid-Base Neutralization for Part 1, Steps 5 & 6
| Test tube 1 | Test tube 2 | Standard | |
| Step 1 | Add acid | Add base | Neutral |
| Color | |||
| pH value |
Table 3: Acid-Base Neutralization for Part 1, Steps 8 & 9
| Test tube 1 | Test tube 2 | Standard | |
| Step 1 | Add base | Add acid | Neutral |
| Color | |||
| pH value |
Table 4: Acidity and Alkalinity Testing for Household Products Data
| Product | Hypothesized pH | Color of Litmus Paper | Color of pH Paper | Actual pH |
Questions
- Why did the grape juice change color when an acid or base was added?
- You added a base, sodium bicarbonate, to test tube 1 that contained citric acid and an acid to test tube 2 that contained base. Why did the grape juice return to its original color?
- Name 2 acids and 2 bases you often use.
