Citric acid, represented by H3Cit, is a triprotic acid. A student mixes together the following solutions...
Citric acid, represented by H3Cit, is a triprotic acid. A student mixes together the following solutions in a styrofoam coffee cup:
• 5.00 mL of 0.64 M citric acid
• 45.00 mL of 0.77 M NaOH
The two solutions start at a temperature of 25.5°C, and reach a
final temperature of 27.8°C. The final, combined mixture has a mass
of 51.6 grams and a specific heat of 4.0 J/g°C. Assume that no heat
is transferred to the cup or surroundings.
a) Write a complete, balanced equation for the neutralization of citric acid (H3Cit) with NaOH.
b) Determine the total heat absorbed by the solution during this reaction.
c) Calculate the number of moles of citric acid that reacted.
d) Calculate the enthalpy of reaction, ∆H, for this reaction in kJ/mol. Is the reaction exothermic or endothermic?
Homework Answers
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Citric acid, represented by H3Cit, is a triprotic acid. A
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A chemistry student weighs out 0.117 g of citric acid (H.CHO), a triprotic acid, into a 250 mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.0800 M NaOH solution Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits.
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A 103.2 mL sample of 1.00 M NaOH is mixed with 51.6 mL of 1.00 M H2SO4 in a large Styrofoam coffee cup; the cup is fitted with a lid through which passes a calibrated thermometer. The temperature of each solution before mixing is 21.45 °C. After adding the NaOH solution to the coffee cup and stirring the mixed solutions with the thermometer, the maximum temperature measured is 30.30 °C. Assume that the density of the mixed solutions is 1.00...
7In experiment 9, we measured the heat of an acid-base ncutralization reaction using a simple Styrofoam cups calorimeter HCl(a) +NaOH (a) H,0)+NaC(aq) 100.0 ml of a 0.100 M solution of NaOH(aq) at 23.2 "C was added to a Styrofoam cup containing 100.0 ml of 0.100 M solution of HCI(aq) at the same initial temperature of 23.2 "C. The final temperature of the solution was measured to be 26.5 "C. Given that the specific heat capacity of the final solution is...
24 Question (1 point) @ See page 236 A 67.0 mL sample of 1.0 M NaOH is mixed with 41.0 mL of 1.0 M H2SO4 in a large Styrofoam coffee cup; the cup is fitted with a lid through which passes a calibrated thermometer. The temperature of each solution before mixing is 27.5°C. After adding the NaOH solution to the coffee cup, the mixed solutions are stirred until reaction is complete. Assume that the density of the mixed solutions is...
i need the answer
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