Now that you know the physical state of each of the reactants and products in this chemical reaction lets think about what you might observe as the reaction running. CH;COОH (аq) + NaHCO3(аq)—н,0(1) + сO2(g) + с Recall the 4 signs that indicate a chemical reaction has occurred. Which of the 4 signs best describes what will be observed as evidence of this chemical reaction? A Color change В Temperature change C Formation of a solid

Do 6-10.

O KINETICS AND EQUILIBRIUM Writing the concentration equilibrium expression for a... Write the concentration equilibrium constant expression for this reaction. CN (aq)+H₂O(1)→HCN(aq)+OH (aq) X 00 00 S 1/5

Acetaldehyde (CH3CHO) is an important chemical both industrially and biologically.  For instance, it is a (somewhat toxic) intermediate in the body's metabolism of ethanol into acetic acid, and thus is possibly implicated in the "hungover" symptoms of someone who has had too much to drink the night before.  In aqueous solution, it establishes an equilibrium with a hydrated form, shown below. CH3CHO (aq)   +   H2O (l)   <-->  CH3CH(OH)2 (aq) You start with an aqueous sample, already at equilibrium, with the CH3CH(OH)2 (the hydrated form) at a concentration of 2.60 M.  You have no information about how much, if any, of the anhydrous form (CH3CHO) is initially in the flask.  If you add 2.0 M of CH3CHO to the reaction flask, and as the equilibrium is being restored the amount of CH3CH(OH)2 changes by 1.13 M, what is the final amount of CH3CHO?

Combination Reactions solid magnesium metal +     oxygen gas          ®        solid magnesium oxide solid copper metal +     oxygen gas          ®        solid copper(II) oxide solid aluminum metal +     iodine solid          ®        aluminum iodide

true or false

Explain your reasoning, please. Thank you.