ANSWER ANY THAT YOU CAN THANK YOU SO MUCH! 14. A chemist wants to make Co(OH)2 according to the following reaction: CoCl2 (aq) + 2NaOH (aq) → Co(OH)2 (s) + 2NaCl (aq) If the student uses 167.4 mL of a 1.39 M solution of NaOH and an excess of CoCl2, how many grams of Co(OH)2 will be formed?

15. A chemist wants to make 150.0 grams of BaCO3 using the following reaction: Ba(NO3)2 (aq) + K2CO3 (aq) → BaCO3 (s) + 2KNO3 (aq) If she has an excess of K2CO3, what volume of a 2.56 M solution of Ba(NO3)2 will she need to use?

16. Of the two concentration units you learned in this chapter, which is more like a ratio of the amount of solute to the amount of solvent?

17. You make a solution by mixing 67.8 grams of KCl with 450.0 grams of water. What is the molality of the solution?

18. A chemist makes a 2.34 m solution by mixing 23.1 g of MgCl2 with water. How many kilograms of water were used?

What are the 4 phases of matter in order of increasing engery content?

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Many reactions take place in aqueous solution. when potential reactants are mixed, a reaction will occur if there is some driving force that favors the formation of products. it is often convenient to categorize reactions in terms of these driving forces: precipitate formation, in which an insoluble solid is formed, weak electrolyte formation, as in a neutralization reaction involving water, or transfer of electrons, as in a redox reaction. these reactions can be represented by full molecular equations, which contain all species in the reaction mixture, or by net ionic equations, which show only the species that actually undergo a change. the latter does not contain the spectator ions, which do not undergo a net change or do not take part in the reaction. part a when the following two solutions are mixed: k2co3(aq)+fe(no3)3(aq) the mixture contains the ions listed below. sort these species into spectator ions and ions that react. drag the appropriate items to their respective bins. view available hint(s) spectator ions ions that react part b what is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? assume that the contribution of protons from h2so4 is near 100 %.ba(oh)2(aq)+h2so4(aq)→ express your answer as a chemical equation. view available hint(s) nothing provide feedback