Flashcards
Chemistry iGCSE - Chemical Formulae, Equations, Calculations -1
Cards in this deck (25)
- 1where heat is applied.
- 2What is the purpose of the ice?to condense the (water) vapour / steam
- 3(3)
- 4—
- 5—
- 6The name of the salt formed in the student’s experiment is zinc sulfate zinc sulfide zinc sulfite zinc sulfurzinc sulfate
- 7The student could have used two other metals in this experiment to make hydrogen. copper iron magnesium potassium silveriron
magnesium - 8Describe a test to show that the gas collected is hydrogen.use burning flame to see if pop/squeak
- 9—2 (1) 2
- 10—hydrated
- 11When the product in equation 1 is gently heated, another reaction occurs. Equation 2 represents this reaction. What do equations 1 and 2 suggest about the reactions?reversible
or
can go in both directions
or
can go backwards and forwards
- 12Give the name of this piece of apparatus.measuring cylinder
- 13What volume of hydrochloric acid is in the apparatus? (2)
- 14Use the volume of hydrochloric acid in the apparatus to calculate the amount, in moles, of hydrochloric acid in the apparatus.
- 15—
- 16What effect would this change have on the rate at which the hydrogen is given off?(rate) increases/faster reaction
- 17What effect would this change have on the volume of hydrogen produced?no effect/same volume (of hydrogen) produced
- 18Look at question 5 on the paper, it's worth 8 marks8 MARKS!!
- 19In 1774, the scientist Joseph Priestley produced oxygen by heating mercury (II) oxide, (HgO). When heated, mercury (II) oxide breaks down into its elements. Write a chemical equation for the breakdown of mercury (II) oxide into its elements.
- 20In 1774, the scientist Joseph Priestley produced oxygen by heating mercury (II) oxide, (HgO). When heated, mercury (II) oxide breaks down into its elements. What name is given to this type of reaction?redox
- 21Give the name of the apparatus that contains the hydrogen peroxide solution.funnel
- 22Suggest how the first sample of gas collected may be different from the samples collected later.the gas contains air from the conical flask
- 23A catalyst increases the rate of decomposition of the hydrogen peroxide. Describe a method you could use to show that the manganese(IV) oxide is acting as a catalyst in this reaction.
- 24Write a chemical equation for the reaction that takes place when sulfur dioxide dissolves in water.
- 25Universal indicator is added to the solution formed in (d)(i). Explain the effect that the solution has on the universal indicator.
