13. All of the precipitate clinging to the inside of the beaker and the stir rod must also be transferred to thebeaker. Using your wash bottle rinse 4 times, each with about 5 mL of deionized water. This usuallysuffices to transfer all of the precipitate to the crucible. Rinse any solid clinging to the stir rod into thecrucible. When you are finished, the beaker should look perfectly clean. Have an instructor check it so youget the technique mark assigned to this.14. Measure 5 mL of methanol (located in the fume hood) into a small, graduated cylinder. Separate the whiteplastic quick connectors on the rubber tubing to break the suction. Pour the methanol into the crucible,swirl gently, then reconnect the plastic quick connectors so that the methanol is pulled through into thesuction flask. Repeat this procedure with another 5 mL portion of methanol then leave the crucible undersuction for 1 to 2 minutes.15. Before turning off the aspirator's water tap, separate the quick connectors. Do not turn off the water first!Then carefully remove the crucible from its rubber holder. (OBSERVATIONS)16. Place the crucible in the oven that you collected it from for 30 minutes. The temperature is set to 150 °C.You can work on the lab report while you are waiting.17. After 30 minutes, using a heat resistant glove, remove the crucible from the oven. Place the crucible in thedesiccator and secure the lid. Allow it to cool to room temperature (~20 minutes). When it is at roomtemperature, weigh it on the same analytical balance as you used previously.18. Calculate the mass of the precipitate after the heating / cooling cycle and record this mass in Table 1. The calcium carbonate sample is heated in the oven for 30 minutes, cooled, and then weighed. Whatcould you do to ensure that the crucible and precipitate are dry?

For precipitate are dry: Pour the methanol into the crucible ,swirl gently ,…

Answered: crucible and precipitate are dry?

Science

Chemistry

crucible and precipitate are dry?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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