— 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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g/mol PHY&CHEM HW Submit Answer Fall 2023 Tutoring S.. The freezing point of ethanol, CH₂CH₂OH, is -117.300 °C at 1 atmosphere. K(ethanol) = 1.99 °C/m In a laboratory experiment, students synthesized a new compound and found that when 13.05 grams of the compound were dissolved in 208.0 grams of ethanol, the solution began to freeze at -117.982 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound? eview Topics] [References] Use the References to access important values if needed for this question. Retry Entire Group 9 more group attempts remaining Previous Next
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
0.376 grams of KHP are placed in an Erlenmeyer flask and some water and a drop of phenolphthalein is added to the flask. The buret is filled with an NaOH (aq) solution of unknown concentration. The NaOH solution is added dropwise to the flask containing KHP (aq). After 12.78 mLs of the NaOH(aq) solution is added, the color of the solution is found to be faintly pink. What is the concentration (M) of the unknown NaOH solution based on this data alone?
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