PLEASE HELP ASAP I CAN'T GET THE ANSWER TO THIS QUESTION FOR MY CHEMISTRY TEST! I'M STUCK
Chromate ions react according to the following equation, where the left side of the reaction is yellow and the right side is orange.
CrO42– + 2H+ ⇄ Cr2O72– + H2O
A student adds sodium hydroxide (NaOH) to the solution at equilibrium. In one to two sentences, describe and explain any changes to the solution that the student will observe.
The student will observe the color of the solution change from orange to yellow. This is because the addition of sodium hydroxide will shift the equilibrium towards the left side of the reaction, favoring the formation of chromate ions (CrO42–) which are yellow in color.
When sodium hydroxide (NaOH) is added to the solution, it will react with the hydrogen ions (H+) present in the solution to form water (H2O). This will decrease the concentration of hydrogen ions in the solution, causing a shift in the equilibrium towards the left side of the reaction to re-establish equilibrium. This shift favors the formation of chromate ions (CrO42–) which are yellow in color.
Certainly! The student can add sodium chloride to both clear liquids and observe the formation of Na+ ions. If additional Na+ ions are formed upon the addition of sodium chloride, it indicates the liquid is the sports drink containing added electrolytes. If no additional Na+ ions are formed, it suggests the liquid is water modified to have a basic pH. By observing the response to the addition of sodium chloride, the student can determine which liquid is the sports drink and which is the basic pH water.
Thank you Bot your a lifesaver but another thing why will adding NaOH cause a shift to left of the reaction?
One last question i need help with from my test PLEASE!
Use the equation of sodium chloride dissolving in water to complete the activity.
NaCl(s) ⇄ Na+(aq) + Cl-(aq)
A student is testing two clear liquids. One liquid is water that has been modified to have a basic pH. The other liquid is a sports drink that contains added electrolytes, including Na+(aq). How can the student use the equilibrium reaction of sodium chloride to determine which liquid is which? In three to five sentences, explain your answer.