Write the acid-base reaction that occurs when an aqueous solution of hcl is added to an aqueous solution of naoh. (use the lowest possible coefficients. omit states-of-matter in your answer.)
for data table b, the ph of baking soda (sodium bicarbonate) was measured. answer the following questions based on your observations. (use the lowest possible coefficients. include states-of-matter under the given conditions in your answer.)
(a) write the dissolution reaction for solid sodium bicarbonate below.
once the ionic solid has dissolved, theamphiproticanion that is formed is able to react as an acid or as a base with water. (for questions b and c, omit states-of-matter in your answer.)
(b) write the acid-base reaction where hydrogen carbonate is the acid and water is the base.
(c) write the acid-base reaction where water is the acid and hydrogen carbonate is the base.

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

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What does the symbol (–hfus) indicate in a phase change?