The greatest total concentration of ions present

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Homework 4 Page 1 Due: Sept. 23 Name _____________________ Chem 6 Sec. Number Homework Assignment 4 Due Sept. 23 (in lecture) Identify the following compounds as ionic or molecular. (See definitions on page 6 of study guide.) Also, identify them as strong, weak, or nonelectrolyte. (Use the flow chart on page 8 of the study guide to fill out the following chart.) If the substance is an electrolyte is it an acid, base or a salt? (See definitions on page 7 of study guide.) Compound Ionic or molecular?

Strong, weak or non electrolyte Acid, base or salt? Eg, HCl molecular Strong electrolyte acid NaCl ionic Strong electrolyte salt CH3 COOH CH3OH HNO3 CH4 NH4Cl CH3Cl H2O Ca(OH)2 K2SO4 NH3 Below is an example of a problem that you might see on a exam. The ability to solve this problem depends on your ability to do the kinds of things needed to fill out the chart above.

Which of the following aqueous solutions has the greatest total concentration of ions present?

(a) 0.01 M HCl (c) 0.02 M Ca(NO3)2 (b) 0.05 M CaBr2 (d) 0.02 M Al(NO3)3

HINTS: A. Label each of the substances as electrolytes or non electrolytes.

B. For all of the electrolytes, label them as acids, bases or salts?

C. Write out the reaction which occurs when the substances above are dissolved in water.(Do they dissolve? Do they break up into ions? If so, how many ions and what are the charges on the ions?)

D. If the substances break into ions, then determine the concentration of ions for those.Homework 4 Page 2 Due: Sep

Reference no: EM131117442

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