What to Include in Your Lab Write Up
Lab: pH in Living Systems

Introduction

• Explain, in detail, the pH scale (range, what it is measuring …)
• Explain acidic, basic, and neutral solutions in terms of their pH
• Explain acidic, basic, and neutral solutions in terms of their H+  and OH-concentrations
• Explain the importance of pH to cells (denaturating proteins)
• Explain how living things control their internal pH (buffers)

Hypothesis

The proteins in milk …

Materials

The materials used include …

Procedure

Part A

Write this in paragraph form.

Part B

Write this in paragraph form.

Results

Table 1

Table 2

Include questions, underlined, and answers here.

Conclusion

• Restate the hypothesis
• Explain the original substances you tested & their pH values that you determined
• Explain the effect of lemon juice on milk proteins (include the before & after appearance of the milk & explain why there was a change)
• Explain the effect of ammonia on milk proteins (include the before & after appearance of the milk & explain why there was a change)
• Make a final statement about the effect of strong acids & bases on the proteins in cells or cell products & explain how organisms take care of this

BACK