Let’s see how much you’ve picked up with these experiments and the reading – answer as best as you can. (No peeking at the answers until you’re done!) Just relax and see what jumps to mind when you read the question. You can also print these out and jot down your answers in your science notebook.
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- What are the most toxic chemicals in this unit? (a) sodium ferrocyanide & ferric ammonium sulfate (b) calcium hydroxide & calcium chloride (d) ammonium nitrate & copper sulfate (d) dihydrogen monoxide & sodium chloride
- What’s true about phenolphthalein? (a) it goes from clear to pink when mixed with bases (b) it’s impossible to spell (c) it is colorless in acidic solutions (d) soluble in water
- Sodium ferrocyanide (a) can create a lethal gas if misused (b) should be handled with care (c) is only used once in this entire manual (d) should never be mixed with anything other than ferric ammonium sulfate
- Which food do you expect to give the highest voltage for the fruit battery?
- What else can you use for the copper strip in the electroplating experiment? (a) copper pipe (b) copper flashing (c) steel pipe (d) galvanized nails
- How does increasing the hydrogen peroxide affect the rate of the iodine clock reaction?
- Why does hydrogen peroxide come in dark bottles?
- Which chemical turns coldest when added to water? (a) calcium chloride (b) aluminum sulfate (c) ammonium nitrate (d) citric acid
- A polymer is: (a) a long piece of spaghetti (b) an element on the periodic table (c) a long molecular chain (d) a plastic bag
- What does a cross-linking agent do?
- Which of the following are cross-linking agents? (a) calcium (b) borax (c) white glue (d) starch (e) bubble gum
- Which substance is both a solid and a liquid? (a) bubble gum (b) slime (c) cornstarch and water (d) last night’s dinner
Need answers?
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