The Rate And Extent Of Chemical Change Practical

Question 1

Describe a method for the practical

Answer 1

1. SUPPORT a GAS SYRINGE with a STAND, BOSS and CLAMP.

2.Using A MEASURING CYLINDER, ADD 50 cm3 of DILUTE HYDROCHLORIC ACID to a CONICAL FLASK

3.ADD 0.4 g of CALCIUM CARBONATE to the FLASK. IMMEDIATELY CONNECT the GAS SYRINGE and START a STOP CLOCK

4. EVERY 10 seconds, RECORD the VOLUME of GAS SYRINGE.
5. WHEN the REACTION is COMPLETE, CLEAN the APPARATUS
6. REPEAT steps 1 to 5 with DIFFERENT CONCENTRATIONS of HYDROCHLORIC ACID

Question 2

How should you record the results?

Answer 2

In a TIME to VOLUME TABLE :

Question 3

How would you plot a graph for this reaction?

Answer 3

Volume in Cm^3 on Y AXIS

Time (s) on X AXIS

Question 4

What are two risks?

Answer 4

-Hydrochloric Acid

-Fizzing in the reaction mixture

Question 5

What are two cautions?

Answer 5

-Wear eye protection

-Use a large conical flask