Acid Neutralizing Capacity of Lake Beds
Description: Pouring a weakly acidic solution containing an indicator through a column of limestone changes its color; doing the same thing with granite produces no color change.
Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year: 1989 Vol: 3 Page: 125
Keywords: Acid Rain, Neutralization, Granite, Limestone
Rating: 
Hazard: Low
- Serious eye damage
- Corrosive to metals
- Skin corrosion hazard
Effectiveness: Good
- Results are clearly observable without guidance
- Good connection from demo to course material
- Low failure rate
- Real world example
- Time to results is medium
Difficulty: Medium
- Procedures with intermediate steps to results
- Simple manipulations for most to perform
Safety Precautions:
- Eye protection required
- Gloves required
- Absorbent materials on hand
- Sodium bicarbonate on hand
Class: Acid-Base Reactions, Gas-Producing Reactions
Division: General
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