Module 4 Flashcards
(19 cards)
What type of reaction is performed with the elephant toothpaste demonstration?
Decomposition
Which of the reactions below represents the molecular chemical equation used in the production of elephant toothpaste?
2H2O2(aq) - >2H2O(l)+ O2(g)
What is a catalyst?
It speeds up a chemical reaction
What is acting as a catalyst in the at-home elephant toothpaste experiment?
yeast
What evidence exists in this reaction to indicate a chemical reaction has occurred?
Heat is released and foam is produced
Why is this reaction considered exothermic?
because it releases heat
What is the purpose of adding dish soap to the experiment?
Dish soap is added as a surfactant: it allows the catalytic yeast to react with as much of the hydrogen peroxide as possible.
Fill in the Blanks.
Yeast acts as a ___________
in the at home elephant toothpaste experiment.
Catalyst
Which answer shows the ionic equation of the at-home experiment for elephant toothpaste?
Ionic equation would not be written for this reaction.
Which of the following answer choices shows evidence of a chemical reaction?
emission of light
whooshing sound
release of heat
formation of gas
Fill in the Blanks
_________ are on the left side of the arrow in a chemical reaction.
reactants
Fill in the Blanks
_________ are on the left side of the arrow in a chemical reaction.
reactants
________ are on the right side of the arrow in a chemical reaction.
products
There are _______ carbon atoms present in Si(C2H3O2)4
8
What type of reaction is represented here: AB—>A+B ?
decomposition
What type of reaction is represented here: AB+CD—>AD+CB ?
double replacement
What would the products of this reaction be: NaBr—>?
Na+Br2 (make sure the equation is balanced completely)
Predict the products and write a complete molecular equation for sodium chloride and silver nitrate.
NaCl(aq) + Ag(NO3)(aq) - > AgCl(s) + Na(NO3)(aq)
Magnesium hydroxide is
insoluble
