1. Heating can remove some or all of the "waters of hydration". Does heating changethe chemical structure of the compound? Explain your answer.2. How would your results for the percent of water in the hydrate and the formula of thehydrate be changed if you weighed the crucible while it was still hot. Be specific andjustify your answer.3. How would your results for the percent of water in the hydrate and the formula of thehydrate be changed if water from the air were absorbed by the hot dry sample as itcools. Be specific and justify your answer.4. Narceine is a narcotic in opium that crystallizes from solution as a hydrate thatcontains 10.8 mass % of water and has a molar mass of 499.52 g/mol. Determine x innarceine.XH20.

We use the heating of hydrated salt experiment to find the amount of water present and subsequently…

Answered: 1. Heating can remove some or all of…

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter9: Chemical Quantities

Section: Chapter Questions

Problem 67AP

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This is relation to Determining the formula of a Hydrate Suppose that in the experiment the student failed to heat the crucible and hydate sample long enough to drive off all the water. How would this mistake influence the value of n determined for the hydrate if everything else was done correctly? Circle the answer and explain: A. Make it greater than the correct value B. Make it less than the correct value EXPLAIN: Suppose the glassware was not dry, then the student recorded the initial amount of sample. How will this influence the results? ? Circle the answer and explain: A. Make it greater than the correct value B. Make it less than the correct value EXPLAIN:
A student has a sample of CaSO4 hydrate and it weighs 0.4813 grams. He heats it strongly to drive off the water of hydration, and after subsequent heatings, the student finds the anhydrous compound has a constant mass of 0.3750 grams. Find the formula of the hydrate.
given the collected data please help find the mass and melting point of the final product?
Suppose that some of the compounds spilled out of the crucible after it was heated. Would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? Briefly explain your answer.
a) Calculate the theoretical percent water for each value of n--divide the sum of the atomic masses due to the water molecules by the sum of all the atomic masses in the hydrate, and multiply the result by 100. Complete the table. b) Compare the percent water in the hydrate with the theoretical values calculated for different values of n. Complete the table
A residue of potassium chloride will be left in the "container" after the heating is completed. Do you expect it weigh more than, less than or the same as the original potassium chlorate sample? Why?
Water and the human body. How does a human being’s water contentchange throughout his life? (fetal stage, at birth, adulthood). How muchwater do we consume in our lifetime?
An organic liquid is either methyl alcoholethyl alcohol or a mixture of the two.A 0.220 g sample of the liquid is burned in an excessof and yields 0.352 g Is the liquid apure alcohol or a mixture of the two?
please answer this and provide the correct amount of sig figs
a hydrated CuSO4 salt was heated and thus dehydrated. Determine the % H2O by weight in the hydrated CuSO4 salt. SHOW WORK TO RECEIVE FULL CREDIT mass of empty dish 43.571 gmass of dish + hydrated salt 44.326 gmass of dish + dehydrated salt 44.054 g 4. Using the data found in question number 3, determine the empirical formula for the hydrated CuSO4salt. What is the chemical name of this dehydrated salt? 5. Suppose that after your second heating, you were impatient and did not wait until your porcelain evaporating dish to cool. Instead, you weighed it while it was still hot. How would this specifically affect the calculated percentage of water in the compound?
Using only addition and subtraction, calculate the amount of H2O produced. Express your answer with the appropriate units.
The computed percent recovery was more than 100%. What does this signify, and what should be done about it?

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