This blog post is about the same experiment that we’ve done in tube 1 and tube 2. The results are the same, so what does this mean? Read on to find out! -The same experiment was done in tube one and two, and the results were identical.

laboratory, apparatus, equipment @ Pixabay

This doesn’t mean that there is a causal relationship between them, but rather means they are related to both each other and something else outside of these experiments (unseen variables). +As shown below we have repeated an experiment from Tubes One and Two with different results: +In this experiment, we’ve done the same thing in Tube One and Two, but with different results. What does this mean? Read on to find out!

-The two experiments were the same except for one variable: what was used as a neutralizing agent after adding an indicator to each tube. The tubes had water added at first and then hydrochloric acid added next (shown by blue dots). This causes iron ions from corroded objects like nails or bolts to be revealed as rust colored flakes that settle on top of liquid within the reaction vessel.

A white substance known as zinc sulfate is often used for possible positive identification of corrosion caused by acidic environmental conditions such as sulfur dioxide exposure in factory pollution or heavy metal contamination


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