Experiment 6 Water in Hydrates PDF

Preview

Summary

Experiment 6 Water in Hydrates Blank Report Sheet...

Description

Name:________________________ Lab Day/Time:____________ Experiment 6: Water in Hydrates Report Sheet Quantitative Portion Mass of crucible with lid

_____________________

Mass of crucible, cover, and sample (before heating)

_____________________

Mass of crucible, cover, and sample after 1st heating

_____________________

Mass of crucible, cover, and sample after 2nd heating

_____________________

Mass of crucible, cover, and sample after 3rd heating (if needed)

_____________________

Mass of original sample (SHOW CALCULATION BELOW)

_____________________

Total mass lost during heatings (SHOW CALCULATION BELOW)

_____________________

Percentage of water in hydrate (SHOW CALCULATION BELOW)

_____________________

Unknown Number (attach label)

_____________________

Quantitative Portion Liquid In Receiving Tube Describe the appearance and smell (if any) Color of cobalt chloride paper after adding drops Describe any changes which occurred on adding drops to solid residue

Deionized Water

Questions 1. Does the data collected in the qualitative portion of the experiment appear to confirm that the liquid produced by heating the hydrate is water? Explain your answer in 2-3 complete, well-written sentences.

2. Strontium chloride dihydrate 18.52% water by mass. a. How many grams of water would be produced if 845.0 grams of the hydrate were heated to constant weight?

b. What mass of this hydrate contains 55.0 grams of water?

3. A chemist heats 2.550 g of a hydrate to drive off all water. At the end of the experiment 1.890 g of the anhydrous salt remains. What was the percentage of water in the hydrate?

Check each of the following or your instructor will deduct points from your score. ◻ All my measurements have correct units. ◻ I have shown all values in my lab work and the answers to the post-lab questions to the correct decimal place and/or number of significant digits. ◻ Answer to questions requiring explanations are written in complete sentence...