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UMUC NSCI100 lab 4

Question # 00266233
Subject: Biology
Due on: 04/30/2016
Posted On: 04/29/2016 11:01 PM

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.png" alt="Text box: type your full name:">UMUC NSCI 101/103

Lab 4: Acids and Bases

INSTRUCTIONS:

· On your own and without assistance, complete thisLab 4Answer Form and submit it via theAssignments Folder by the date listed on yourCourse Schedule (underSyllabus).

· 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 yourLab 4Answer 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.

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UMUC NSCI100 lab 4

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Posted On: 04/29/2016 11:03 PM
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Lab-4_Questions-1.docx (36.42 KB)
Preview: purple xx value777Table xx Acidity and xxxxxxxxxx Testing for xxxxxxxxx Products xxxxxxxxxxxxxxxxxxxxxxx xxxxxxx of xxxxxx PaperColor of xx PaperActual pHTomato xxxxxxxxx Yellow x xxxxxx hold xxxxxxxxxxxxx Blue 12Milk6 xxxx Yellow 6 xxxxxxxx 4Pink xxxxxx x 5Lemon xxxxx 4Pink Orange xxxxxxxx dishwashing8Blue Light xxxx 9QuestionsWhy xxx xxx grape xxxxx change color xxxx an acid xx base xxx xxxxxxxx is xx indicator, meaning xx is sensitive xx acid xxx xxxxx environment xxxx an acid xxx added to xxx the xxxxxxxx xxxx were xxxxxxxxxxxx to.....
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