Calorimetry

100.0 ml of an acid solution and 100.0 ml of a base solution were combined in a calorimeter. A temperature change of 7.50 degrees Celsius was measured. The density of the final solution was measured to be 1.045 g/ml. The specific heat of the final solution was 4.04 J/g - degrees Celsius. How many Joules of heat were evolved in the neutralization of the acid by the base? (hint - Q-total = (m)soln(SH)soln(change temp) + Ccal(change temp.)) Is the temperature change negative or positive? When you set this up do you take the (m)soln multiplied times the (SH) times the change in temp. then add it to the Ccal multiplied times the same temperature change?

Net ionic equations

Write the balanced molecular equation, complete ionic and net ionic equation for the following acid base reaction. HCL(aq) + NH3(aq) NH3 is an exception, so I'm not sure what to do with it.

Titration of a Strong Acid

Procedure 1 ( click to view assignments for this procedure ) PLEASE NOTE: Titration requires several steps in order to obtain exact results. 1. Take a clean Erlenmeyer flask from the Glassware shelf and place it on the workbench. 2. Add 25 mL HCl (of unknown concentration) to the flask. 3. Add 2 drops of phenolphthalein to the flask. 4.Take a burrete from the Glassware shelf and place it on the workbench. 5. Fill the burette with 50 mL of 1M NaOH solution. Record this initial volume. 6. Drag the flask to the lower half of the burette so that the two will be connected. 7. Open the Data window and click on the flask. Click the Pushpin icon in the blue bar of the Dat... click for more

Chemistry Questions

1. State whether each of the following statements is true or false: A A mole of H2O weighs the same as a mole of SO2 B C2H6 is a saturated organic compound. C There is more than one compound with the formula C5H12. D In chemical reactions the total number of moles of products must be the same as the total number of moles of reactants. E Energy is liberated when chemical bonds are formed between atoms. F The lower the specific heat of a substance, the more heat is required to increase its temperature by a specified amount. G The density of ice is greater than that of liquid water. H Heat... click for more

Heat Engine, Net Work, Waste Heat

Heat Engine, Net Work, Waste Heat. See attached file for full problem description. 6.87 only.