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Write the correct word from each parentheses in the blanks….

Write the correct word from each parentheses in the blanks. D2L doesn’t understand type-o’s so please check your spelling or copy-paste from the parentheses for full credit. As pH increases, [H+] in solution _______ (increases/decreases) causing the acidic or basic surface functional groups to  _______ (accept/donate) H+. As a result, the charges of the surface functional groups become more _______ (positive/negative). Consequently, cation adsorption and CEC _______ (increase/decrease), whereas anion adsorption and AEC _______ (increase/decrease) with increasing pH.

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Consider the table of water quality data for a stream sample…

Consider the table of water quality data for a stream sample (below). One important cation is missing from this table. Assume that no ion pairs or solid precipitates are present in the sample. Fill in the four boxes labeled A, B, C and D  For A, format answer as: A, or A^#- / A^#+ if there is a charge For B-E, type the numerical value If needed, use E’s to designate scientific notation to make numbers fit in the blanks (ex: 0.1 = 1.00E-01; 10 = 1.00E+01). Concentration (mg/L) Concentration (mmoles/L) Charge Concentration (meq/L) Total alkalinity (titratable, as mg/L CaCO3) 294 pH 7.4 3.98E-05 3.98E-05 A B C D Mg2+ 30 1.234 2.469 Na+ 14 0.609 0.609 K+ 3 0.077 0.077 Total cation charges E pOH 6.6 2.51E-04 2.51E-04 Total orthophosphate P 0.05 2.30E-03 nitrate N 1.0 0.071 0.071 sulfate 86 0.895 1.791 chloride 40 1.130 1.130 DOC (mg of C/L) 2 0.2 HCO3- 357 5.85 5.85 Total anion charges 8.87 Charge balance 0.00% Calculated ionic strength* 0.014 *Needed for upcoming questions _______ B:  _______ C:  _______ D: _______ E: _______

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