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Why do some compounds with polyatomic ions have parentheses and can you show me an example?

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Hubert Koch
Hubert KochLv2
28 Sep 2019

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Related questions




Questions 4-6 only

What is the total concentration of all ions (the sum of their individual concentrations) in aqueous solutions of the following?

Hint: Each substance is an electrolyte that dissociates in water to produce ions. Use the link table of polyatomic ions if you do not recognize the polyatomic ion. For example, Na2SO4 -> 2Na1+ + SO42- when it dissolves, so a 1 M soln of Na2SO4 is 2M in Na1+ and 1M in SO42- and the total concentration of ions is 2 M + 1 M = 3M.

0.0760-M CaCl2 _____________ M
0.0160-M Na2SO4 _____________ M
0.0740-M K2Cr2O7 _____________ M

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