— What is the temperature increase? ☐A 4.9°C B 6.5°C C 8.7°C D from an 2 When 50 cm of hydrochloric acid of concentration 2.0 mol dm³ is added to 50 cm³ of sodium hydroxide solution of concentration 2.0 mol dm3, the temperature increase is 13.0°C NaCl(aq) + H₂O(1) HCl(aq) + NaOH(aq) The experiment is repeated using 25 cm³ of the same hydrochloric acid and 50 cm³ of the same sodium hydroxide solution. 13.0°C 50:50 76 100 ment in its sandard state. (Total for Question 1 = 1 mark) 3,4 25:50 (Total for Question 2=1 mark) Use this space for any rough working. Anything you write in this space will ga CLASSWIZ CASIO

— What is the temperature increase? ☐A 4.9°C B 6.5°C C 8.7°C D from an 2 When 50 cm of hydrochloric acid of concentration 2.0 mol dm³ is added to 50 cm³ of sodium hydroxide solution of concentration 2.0 mol dm3, the temperature increase is 13.0°C NaCl(aq) + H₂O(1) HCl(aq) + NaOH(aq) The experiment is repeated using 25 cm³ of the same hydrochloric acid and 50 cm³ of the same sodium hydroxide solution. 13.0°C 50:50 76 100 ment in its sandard state. (Total for Question 1 = 1 mark) 3,4 25:50 (Total for Question 2=1 mark) Use this space for any rough working. Anything you write in this space will ga CLASSWIZ CASIO

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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When 16.3 g of an organic compound known to be 57.15% C, 4.8% H, and 38.06% O by mass is dissolved in 700.7 g of water, the freezing point is −0.343⁢ ∘C. The normal freezing point of water is 0⁢ ∘C. What is the molecular formula for the organic compound? Assume that the organic compound is a molecular solid and does not ionize in water. ?f values for various solvents are given in the colligative constants table.
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3) Camphor (CoH160) melts at 179.8 °C, and it has a particularly large freezing point depression constant of 40.0 "C/m. When 0.186 g of an organic substance of unknown molar mass is dissolved in 22.10 g of liquid camphor, the freezing point of the mixture is found to be 176.7 C. What is the molar mass of the organic substance?
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Chromium (III) chloride forms a hexahydrate, CrCl3*6H2O (s). How many grams of CrCl3*6H2O (s) are needed to prepare 250 milliliters of an aqueous solution that is .500 M in Cr3+ (aq)?
Shown below is a plot of the solubility of benzoic acid in water as a function of temperature. Estimate the Solubility (Constant) Sof benzoic acid at 60°C (include units!) Solubility of Benzoic Acid in Moles/Liter in Water as a Function of Temperature 0.12 Moles per Liter 0.1 0.08 0.06 0.04 0.02 20 0.092 moles/liter If you have trouble viewing this image Click to open: 0.04 moles/liter 0.06 moles/liter 30 1.34 moles/liter 50 40 Degrees Centigrade 60 70
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