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Question 177

Potassium hydroxide reacts with dilute sulfuric acid to form potassium sulfate and water.

potassium hydroxide+sulfuric acid→potassium sulfate+water \text{potassium hydroxide} + \text{sulfuric acid} \rightarrow \text{potassium sulfate} + \text{water} potassium hydroxide+sulfuric acid→potassium sulfate+water

A student carried out a titration to find the exact volume of dilute sulfuric acid that reacted with 25.0 cm3 of potassium hydroxide solution.

There were five steps in the titration, but they are not listed in the correct order.

Step V: Swirl the conical flask continuously while running the dilute sulfuric acid from the burette until the indicator undergoes a sharp colour change.

Step W: Use a volumetric pipette to measure exactly 25.0 cm3 of the potassium hydroxide solution.

Step X: Record the final volume reading on the burette and determine the total volume of sulfuric acid delivered.

Step Y: Fill a clean burette with the dilute sulfuric acid and note the starting meniscus level.

Step Z: Transfer the measured potassium hydroxide into a clean conical flask and add three drops of phenolphthalein indicator.

Write the steps in the correct order.

Some of the steps have been completed for you.

YZ
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Acids Questions

  1. GCSE
  2. /Chemistry
  3. /Acids

Practise Edexcel GCSE Chemistry Acids with exam-style questions for Foundation and Higher tier. 276 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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