We will have to pick which equipment to use to measure the temperature from vari

Question

We will have to pick which equipment to use to measure the temperature from various equipment's depending on what's available. Obtain 2 nested Styrofoam cups that will function as your calorimeter for this experiment. Carefully measure out exactly 25. 0 ml of HCI (density = 1.02 g/ml) and pour it into your calorimeter. What is the function of a calorimeter? Measure and record the mass of a magnesium strip (~0.15 g). using an analytical balance. What does it mean if the magnesium strip is not shiny? Slide the temperature probe into the small notch cutout on the cover and place the probe into the HCI. Stir the HCI with the probe to maintain a uniform temperature throughout the solution. Wait until the temperature stabilizes. What would be the significance of covering the calorimeter? Roll the magnesium ribbon into a loose ball. Collect temperature readings. After a 'initial temperature' is determined, slide the cover aside and drop the ball of magnesium into the calorimeter. Slide the cover back into place. Continue stirring and reading temperature until enough data point are taken until you have the 'final temperature'. What would happen to the reaction if the some of Mg is no. submerged in the solution.

Explanation / Answer

1. A calorimeter is an object used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity. Here the HCl is being reacted to a fixed amount of Mg and we are interested to know the heat of the reacytion.

2.Magnesium strip is not shiny because Magnesium is an reactive metal in the reactivity series, when it is exposed to oxygen it will form metal oxides.With Magnesium, what will happen if exposed to oxygen for too long is create a white coating on the outside of it which will impede and effect the burning process.

3.A calorimeter uses an insulated lid, or insulated surroundings. The covering is used as insulation to keep the heat of the liquid or solid sample during a reaction for an accurate measurement in the change of temperature to provide the best possible accurate results.

4. If some of the Mg will not submerged in the reacting solution then incomplete reaction will take place and the consequence will be incorrect results.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.