Raapa te tekau ma tahi o Paenga-whawha Wednesday 11 April
level 2 Titrations and calculations as91161 (4 credits, internal)
Here are 2 power points of titrations and calculations if you need to go over it again or you missed it! (Credit to Sally O'Hare)
Here's a quick clip on how to do a titration...
THIS STANDARD CONSISTS OF:
Quantitative analysis involves collecting primary data from an acid-base titration, and processing both primary and secondary data to solve quantitative problems.
• The standard solution to be used in the titration may be provided. The titration procedure and balanced equations will be provided.
• Student selected data will be used in determining the accuracy of the titration.
Carry out quantitative analysis (ACHIEVED) involves:
• collecting titration data that contains at least three titre values that fall within a range of 0.4 mL; the average titre value must be within 0.8 mL of the expected outcome
• solving quantitative problems that use the relationships n=m/M and c=n/V to calculate one variable given the other two (the relationships are not given). Molar masses for substances may be provided. Calculations must be carried out using appropriate procedures (not provided).
Carry out in-depth quantitative analysis (MERIT) involves:
• collecting titration data that contains at least three titre values that fall within a range of 0.4 mL; the average titre value must be within 0.5 mL of the expected outcome
• solving quantitative problems that involve at least two steps and require application of relationships such as n=m/M and c=n/V. Titration calculations must be carried out correctly using only concordant titre values.
Carry out comprehensive quantitative analysis (EXCELLENCE) involves:
• collecting titration data that contains at least three titre values that fall within a range of 0.2 mL; the average titre value must be within 0.2 mL of the expected outcome
• solving quantitative problems that involve more than two steps, and the use of stoichiometric principles. Answers to calculations must demonstrate correct units and appropriate use of significant figures.
Quantitative analysis involves collecting primary data from an acid-base titration, and processing both primary and secondary data to solve quantitative problems.
• The standard solution to be used in the titration may be provided. The titration procedure and balanced equations will be provided.
• Student selected data will be used in determining the accuracy of the titration.
Carry out quantitative analysis (ACHIEVED) involves:
• collecting titration data that contains at least three titre values that fall within a range of 0.4 mL; the average titre value must be within 0.8 mL of the expected outcome
• solving quantitative problems that use the relationships n=m/M and c=n/V to calculate one variable given the other two (the relationships are not given). Molar masses for substances may be provided. Calculations must be carried out using appropriate procedures (not provided).
Carry out in-depth quantitative analysis (MERIT) involves:
• collecting titration data that contains at least three titre values that fall within a range of 0.4 mL; the average titre value must be within 0.5 mL of the expected outcome
• solving quantitative problems that involve at least two steps and require application of relationships such as n=m/M and c=n/V. Titration calculations must be carried out correctly using only concordant titre values.
Carry out comprehensive quantitative analysis (EXCELLENCE) involves:
• collecting titration data that contains at least three titre values that fall within a range of 0.2 mL; the average titre value must be within 0.2 mL of the expected outcome
• solving quantitative problems that involve more than two steps, and the use of stoichiometric principles. Answers to calculations must demonstrate correct units and appropriate use of significant figures.