21. Consider the reaction: 3 Ca(OH)2 (aq) + 2 H3PO4 (aq) Ca3(PO4)2 (aq) + 6 H₂O (1) How many millilitres of 0.650 M Ca(OH)2 solution are needed to neutralize completely 50.0 mL of 0.800 M H3PO4 solution? a) 70.6 mL b) 92.3 mL c) 23.1 mL d) 58.8 mL b) 5.01x10¹ ppm e) 4.62x10 ppm Q22. A solution is prepared by mixing 25.0 g of naphthalene (C₁0Hs) with 0.750 L of liquid CS2 (density = 1.263 g/mL). What is the concentration of naphthalene in parts per million (ppm)? a) 7.34×10¹ ppm d) 2.96x10¹ ppm e) 46.2 mL c) 2.57x10¹ ppm

21. Consider the reaction: 3 Ca(OH)2 (aq) + 2 H3PO4 (aq) Ca3(PO4)2 (aq) + 6 H₂O (1) How many millilitres of 0.650 M Ca(OH)2 solution are needed to neutralize completely 50.0 mL of 0.800 M H3PO4 solution? a) 70.6 mL b) 92.3 mL c) 23.1 mL d) 58.8 mL b) 5.01x10¹ ppm e) 4.62x10 ppm Q22. A solution is prepared by mixing 25.0 g of naphthalene (C₁0Hs) with 0.750 L of liquid CS2 (density = 1.263 g/mL). What is the concentration of naphthalene in parts per million (ppm)? a) 7.34×10¹ ppm d) 2.96x10¹ ppm e) 46.2 mL c) 2.57x10¹ ppm

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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