Mystery 1 & 2
What two substances did we mix together to make our pennies look shiny and new?
1.Vinegar
2.Salt
What is an example of a citric acid?
answers will vary: orange juice, lemon juice, tomato juice, lemonade, grapefruit juice, lime juice, etc.
What were the alchemist main goal?
To become rich,by creating gold.
We learned that baking powder is not a good substance to use to test if something is an acid. Why?
Baking powder is not a good substance to use to test if something is an acid because it will react with water, which is not acidic. This is because baking powder already contains an acid in it.
When the pennies became shiny, what happened:
a.The dull layer was removed.
b.A shiny layer was added.
c.A change to the penny occurred.
Why are some acids used in food?
Some acids are used in food because they give it a sour taste.
What caused the stone gargoyles on top of the old church to turn into a new substance?
acid rain
What happened when we put a steel nail into a bag with vinegar and pennies?
The copper particles that were removed from the pennies formed on the nail, causing it to look like it became a copper nail.
A(n)______________occurs when two or more substances are mixed together and result in a new substance.
Chemical reaction
Why couldn't we see the copper particles in the vinegar?
Because the copper particles broke down into very small (too small to see) particles in the vinegar.
Name at least three properties of acids?
1. Tastes sour
2.Dissolves metal
3. They are reactive (they bubble)
4.Burn to the touch (or in cuts)
After we did the penny experiment, what is the name of the process that made the pennies turn blue/green?
oxidation