Written Final Review Titration and Calorimetry. Titration 1. Use the data below to answer the following questions: 2.8 M HNO 3 NaOH ------------------------------------------------------------------------------------------

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Presentation transcript:

Written Final Review Titration and Calorimetry

Titration 1. Use the data below to answer the following questions: 2.8 M HNO 3 NaOH Final reading after end point is reached23.7 ml19.2 ml (Nearest.1ml) Beginning reading in burettes1.2 ml1.3 ml (Nearest.1 ml) Volume used (liters)

a.How many moles of HNO 3 are used? b. How many moles of NaOH are used? ___________ c. What is the molarity of NaOH? d. What is the name of HNO 3 ?_____________________ e. What is the name of NaOH?____________________

A piece of copper with a mass of 40 g is heated and then placed in a beaker containing 200 g of water. The temperature of the water increases form 26 o C to 36 o C. The specific heat of copper is J/g ( o C) and the specific heat of water is J/g( o C). What was the original temperature of the piece of copper? Copper Water m = _________ grams CuC H2O = __________ J/g( o C) C Cu = _________ J/g( o C)T initial = ________ o C (water) T initial = __________ o C (metal)T final = _________ o C T final = _________ o Cm = _____________ grams H 2 O

Mass of Sample27.3 g Volume of water in calorimeter25.75 mL Initial temperature of water in calorimeter22°C Temperature of hot water100°C Initial temperature of sample100°C Final temperature of water in calorimeter37°C Final temperature of sample37°C 1. Calculate the change in temperature of the sample 2.Calculate the change in temperature of the water in the calorimeter 3.Calculate the energy gained by the water in the calorimeter 4.Calculate the specific heat of the sample.

5.Based upon your answer for Question 4, what is the identity of the sample ? TABLE 2: SPECIFIC HEATS OF COMMON SUBSTANCES Substance Specific Heat (cal/g  °C) Gold0.031 Silver0.052 Aluminum0.215 Ethanol0.584 Water1.00