When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 9.07 g of K2SO4(s) are dissolved in 110.50 g of water, the temperature of the solution drops from 23.80 to 20.79 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.88 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of K₂SO4(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. AH dissolution kJ/mol Brook Cengage Leaming Thermometer Cardboard or Styrofoam lid Nested Styrofoam cups Reaction occurs in solution.

An aqueous solution of aluminum iodide, All3, contains 12.6 grams of aluminum iodide and 17.5 grams of water. The percentage by mass of aluminum iodide in the solution is %.

Combustion of hydrocarbons such as undecane (C,H) produces carbon dioxide, a "greenhouse gas. Greenhaluse gases in the Earth's atmosahere tan trap the Sun's heat, raising the averege temperature of the Earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carban diaxide. 1. Write a balanced chemical equation, including physical state symbols, for the combustion of liquid undecane into pmequs carbon diocide and gaeous water. D-0 2. Suppose 0.300 kg of undecane are burned in air at a pressure of exatly I atm nd a temperature of 17.0 "C. Calculate the volume of carbon dionide gas that is produced. Round your answer to 3 significant digits.

How many mL of a 0.203 M aqueous solution of cobalt(II) nitrate, , must be taken to obtain 6.24 grams of the salt?

What can you reasonably predict to occur when elemental bromine is added to a solution containing the iodide ion? Write chemical equations as part of your explanation.

How do I calculate/ what is the equation for the % weight/weight when I have a mass in grams and a volume of titrant delivered? Unknown Chrloride mass 0.1173g and 35.47 ml.

Please don't provide handwritten solution ...

4.4 Discuss the process of sampling and preparation of laboratory sample in quantitative analysis.

The mass of K3PO4 needed to prepare 250.0mL of an aqueous solution in which PO4-3 concentration is 0.0550M.   The answer is ……………………… 6

please use the information in the photo attached to calculate the molarity of the students sodium hydroxide solution, round to 3 significant digits.