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.
9 answers
The student can use the equilibrium reaction of sodium chloride to determine which liquid is which by observing the formation of Na+ and Cl- ions in the solution. In the basic pH water, there should be very minimal Na+ and Cl- ions present, as the ions from sodium chloride are only released when the salt dissolves. However, in the sports drink, which contains added Na+ ions as electrolytes, there should be a noticeable presence of Na+ ions in the solution. By performing a simple test to detect the presence of Na+ ions in each liquid, the student can determine which liquid is the sports drink.
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.
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 a color change from orange to yellow in the solution when sodium hydroxide is added. This is because NaOH reacts with H+ ions to form water, shifting the equilibrium towards the production of chromate ions (CrO42-), which are yellow in color, resulting in the observed color change.
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.
Answer: The solution will shift towards the reactants, increasing the concentration of yellow chromate ions (CrO4^2-) and decreasing the concentration of orange dichromate ions (Cr2O7^2-).
Is this correct?
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.
Answer: The solution will shift towards the reactants, increasing the concentration of yellow chromate ions (CrO4^2-) and decreasing the concentration of orange dichromate ions (Cr2O7^2-).
Is this correct?
Yes, that is correct. When sodium hydroxide is added to the solution at equilibrium, the shift in equilibrium caused by the reaction of NaOH with H+ ions will favor the formation of chromate ions (CrO42-), leading to an increase in the concentration of yellow chromate ions and a decrease in the concentration of orange dichromate ions.
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.
Answer: The student can use the equilibrium reaction of sodium chloride to determine which liquid is water with a basic pH and which is the sports drink with added electrolytes. If the liquid is water with a basic pH, the added sodium chloride will dissolve more readily. If the liquid is the sports drink with added electrolytes, the presence of sodium ions will reduce the solubility of NaCl. By observing which liquid has more NaCl dissolve, the student can determine which liquid is which.
Is this correct?
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.
Answer: The student can use the equilibrium reaction of sodium chloride to determine which liquid is water with a basic pH and which is the sports drink with added electrolytes. If the liquid is water with a basic pH, the added sodium chloride will dissolve more readily. If the liquid is the sports drink with added electrolytes, the presence of sodium ions will reduce the solubility of NaCl. By observing which liquid has more NaCl dissolve, the student can determine which liquid is which.
Is this correct?
Yes, that is correct. By observing the solubility of sodium chloride in the two clear liquids, the student can differentiate between water with a basic pH and the sports drink with added electrolytes. If the sodium chloride dissolves more readily in one of the liquids, it indicates that it is water with a basic pH, as the presence of sodium ions in the sports drink would decrease the solubility of NaCl. This observation can help the student determine which liquid is which based on their compositions.
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. Add water, get rid of Na+, add electrolytes..adding Na+
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. Add water, get rid of Na+, add electrolytes..adding Na+
Based on the equation NaCl(s) → Na+(aq) + Cl-(aq), the student can use the equilibrium reaction of sodium chloride to determine which liquid is water with a basic pH and which one is the sports drink containing added electrolytes. When the student adds sodium chloride to the liquids, if the NaCl dissolves readily in one of the clear liquids and forms Na+(aq) and Cl-(aq), that liquid is water with a basic pH. However, if the sodium chloride does not dissolve easily and Na+ ions are already present in the liquid, this indicates that the liquid is the sports drink containing added electrolytes, and the presence of Na+ ions prevents further dissolution of NaCl. By observing the reaction of NaCl dissolution in the two liquids, the student can determine which liquid is which based on the presence or absence of Na+ ions and the ease of dissolution.
3 answers