To determine the percentage of water in a hydrated salt, a student heated a 1.2346 g sample of the salt for 30 minutes; when cooled to room temperature, the sample weighed 1.1857 g. after the sample was heated for an additional 10 minutes and again cooled to room temperature, the sample weighed 1.1632 g. which of the following should the student do next?
a. use the smallest mass value to calculate the percentage of water in the hydrated salt.
b. repeat the experiment with a new sample of the same mass and average the results.
c. repeat the experiment with a new sample that has a different mass.
d. reheat the sample until its mass is constant.
e. use the average of the mass values obtained after the two heatings to calculate the percentage of water in the hydrated salt.
Answers: 2
Chemistry, 22.06.2019 17:10, hahahwha
Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]
Answers: 2
Chemistry, 22.06.2019 23:00, catdog5225
What is formed when amino acids form long chains or polymerize
Answers: 1
To determine the percentage of water in a hydrated salt, a student heated a 1.2346 g sample of the s...
Mathematics, 13.10.2019 11:10
Mathematics, 13.10.2019 11:10
Health, 13.10.2019 11:10
Chemistry, 13.10.2019 11:10
Mathematics, 13.10.2019 11:10
Arts, 13.10.2019 11:10