A student pipetted exactly 50.00 mL of 0.1038 M HCl into a 250-mL Erlenmeyer flask containing 0.3735 g of an antacid tablet. The solution was heated and boiled to remove any
CO2. Approximately 25 mL of water and three drops of phenolphthalein indicator was added
to the Erlenmeyer flask containing the HCl and antacid tablet. A 50 mL buret was rinsed and
filled with a 0.1017 M NaOH solution. The initial volume of the buret was read and recorded
as 2.30 mL. The NaOH solution was carefully added to the antacid/HCl solution until a
permanent very slight pink coloration was noticed. The buret was read again and recorded as
22.82 mL. Calculate the acid equivalent (g HCl/g antacid) of the antacid tablet.

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

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)

What conclusion can you draw from this experiment about the components of the black ink?