Question related to conductivity in a beaker

In summary, when a chemist titrates a solution of sulfuric acid into a solution of barium hydroxide until there is excess acid, the conductivity set-up placed in the beaker will first show a glowing bulb, then no glow as the solution becomes neutralized, and then a glowing bulb again as more acid is added and the solution becomes unbalanced. This happens because the barium sulfate formed at equivalence precipitates, leaving equal amounts of H+ and OH- ions, resulting in a neutral solution before becoming unbalanced again with the addition of more acid.
  • #1
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Homework Statement



A chemist filled a burette with a solution of sulfuric acid. She then titrated it into a solution of barium hydroxide to a point where there was excess acid. If a conductivity set-up is placed in the beaker with the barium hodroxide at the start of the reaction, what will happen?


Homework Equations



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The Attempt at a Solution



This is a multiple choice question


a. Bulb glows continually
b. Bulb never glows
c. Bulb will nto glow until the acid is titrated
c. Bulb will glow then stop
e. The blub will glow, stop, then glow again.

The answer is e but I am unsure why it has the glow, stop, and then glow again effect.
 
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  • #2
You are looking for dissociated species in solution. At first you have barium hydroxide then you have barium sulfate at equivalence. What happens when you add the next drop of ACID?
 
  • #3
Oh, this question is old, but I was able to get the answer. It's E because with more acid, that neutralizes the solution which means no conductivity. Then with more acid, it's unbalanced, and will conduct again.

Hm ... looking back at this, can you explain why the solution is neutral if there is even amounts of acid and base substances?
 
  • #4
Barium sulfate precipitates leaving an equal amount of H+ and OH-... water.
 

FAQ: Question related to conductivity in a beaker

What is conductivity and why is it important in a beaker?

Conductivity is the ability of a material to allow the flow of electric charge. In a beaker, conductivity is important because it can help determine the presence and concentration of ions in a solution, which can provide valuable information about its chemical properties.

How is conductivity measured in a beaker?

Conductivity in a beaker is typically measured using a conductivity meter, which works by passing an electric current through the solution and measuring the resulting voltage. The conductivity is then calculated using the measured voltage and the distance between the electrodes.

Can the shape or material of the beaker affect conductivity?

Yes, the shape and material of the beaker can both affect conductivity. A wider and shallower beaker will have a lower resistance, resulting in higher conductivity, compared to a narrower and taller beaker. Additionally, the material of the beaker can also impact conductivity, with materials like glass having a higher resistance compared to metals.

How does temperature affect conductivity in a beaker?

Temperature can have a significant impact on conductivity in a beaker. As temperature increases, the movement of ions and molecules in the solution also increases, resulting in higher conductivity. This is why conductivity measurements are often corrected for temperature to ensure accurate results.

What factors can influence the conductivity of a solution in a beaker?

Several factors can influence the conductivity of a solution in a beaker, including the concentration of ions, the type of ions present, temperature, and the presence of impurities or other substances in the solution. Additionally, the shape and material of the beaker, as well as the distance between the electrodes, can also affect conductivity.

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