10B Science Chemistry Investigation Quiz

What is the name of the compound/solution that we used in our practical?

• phosphoric acid

• sodium thiosulfate

• sodium chloride

• sodium thiophosphate

In our investigation, what is the independent variable?

• temperature of the sodium thiosulfate solution

• temperature of the water

• time taken for the 'X' to disappear (reaction rate)

• concentration of the sodium thiosulfate solution

In our investigation, what is the dependent variable?

• the temperature of the sodium thiosulfate solution

• the concentration of the sodium thiosulfate solution

• the time taken for the 'X' to disappear (reaction rate)

• time taken for the sodium thiosulfate solution to cool down

What is one controlled variable that was taken into consideration in our practical?

• the concentration of the sodium thiosulfate solution

• the temperature of the sodium thiosulfate solution

• the time it took for the 'X' to disappear

• the temperature of the classroom

What are some potential safety hazards for this experiment? (more than one answer)

• Hydrochloric acid

• boiling hot water

• sulfur dioxide byproduct

• year 10 students throwing ice cubes at each other

What is the name of the piece of equipment that you combined the sodium thiosulfate and distilled water in?

• measuring cylinder

• test tube

• beaker

• conical flask

What order did you complete the following steps in?

a) heat up the contents of the conical flask using a bath of warm water

b) add hydrochloric acid to the conical flask

c) use a stopclock to time how long the cross takes to disappear

d) add sodium thiosulfate to the conical flask

• d, a, b, c

• b, a, d, c

• d, b, a, c

• b, d, a, c

What should go on the Y-axis of the graph?

• reaction time/rate

• volume of solution

• temperature of solution

• concentration of solution

What should go on the X-axis of your graph?

• reaction time/rate

• volume of solution

• temperature of solution

• concentration of solution

What 2 things need to be included on your graph?

• a legend

• units

• a table of results

• a title