CHM1011 - Chemistry I - S1 2025
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Results
Determination of Error in Auto-Pipette
Aliquot Number: | Weight (g) | Volume(calculated) (μL) | |
1 |
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2 |
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3 |
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Mean | g | μL | ±Std Dev μL |
Results
Standardisation of Sodium Hydroxide
Titration Results:1000 μL aliquots of hydrochloric acid ( mol/L) against a sodium hydroxide solution
Please only fill in 3 concordant results!
| Titration number: | 1 | 2 | 3 | Error | ||
| Titre (mL) | ±0.10 mL |
Average (mean) volume of concordant titres: mL
Concentration of sodium hydroxide solution (to 4 sig figs): M
Quantity of Acetic Acid in Salad Dressing
Titration Results: 1000 μL aliquots of salad dressing against a sodium hydroxide solution
Please only fill in 3 concordant results!
| Titration number: | 1 | 2 | 3 | Error | ||
| Titre (mL) | ±0.10 mL |
Average (mean) volume of concordant titres: mL
Concentration of Acetic Acid (M) (to 3 sig figs): M
Concentration of Acetic Acid (as %w/v) (to 3 sig figs): %
Note: %w/v = (g / mL) x 100%
When writing an aim, it should be in the format of the Goal (what do you want to achieve) and the Means (how you plan to achieve it).
Read over Exercise 2 in your lab manual to assist you with completing the two aims for this experiment. Record these aims in your laboratory notebook, so that you will be able to address them when you write the conclusion for your lab report.
Aims:
- To standardise a solution of via titration against a primary standard solution of.
- To determine the concentration of acetic acid in a sample of salad dressing via against asolution of sodium hydroxide.
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Eye Wash and Safety Shower Stations
Locate the eye wash and safety shower stations, denoted by these signs as you go on your virtual tour of the First Year laboratory.How many eye wash/safety shower stations are there?
Footware
During your chemistry laboratory sessions it is compulsory to wear appropriate footwear. Using the figure below as a guide, select the items of footwear which are inappropriate for the chemistry laboratory.
Fire Extinguishers
Most of the fire extinguishers located throughout the laboratory are carbon dioxide fire extinguishers, since often, water should not be used on a fire in a chemistry laboratory.
From the options below, select the types of fires where water should not be used.
Emergency Protocols
In the case of an emergency, we may be evacuated from the laboratory. In the case of an evacuation, the following protocols must be observed:
- Upon hearing the warning siren (a beeping sound), we must prepare to evacuate. This means make the laboratory safe (e.g. switch off hotplates, replace caps on reagents) and prepare to leave the laboratory (e.g. remove gloves, retrieve phones).
- When we hear the evacuation siren (a whooping sound), head towards the nearest emergency exit, and gather at the evacuation assembly area (at 14 Rainforest Walk, in front of the Faculty of Science Student Lounge).
- We must remain at the assembly area until the All Clear is given to return to the laboratory.
Referring to the emergency evacuation plan in your laboratory manual, in which direction/s are the emergency exit/s for the First Year Laboratories?
Eye Wash and Safety Shower Stations
Locate the eye wash and safety shower stations, denoted by these signs as you go on your virtual tour of the First Year laboratory.How many eye wash/safety shower stations are there?
Footware
During your chemistry laboratory sessions it is compulsory to wear appropriate footwear. Using the figure below as a guide, select the items of footwear which are inappropriate for the chemistry laboratory.
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