Experimental Techniques
1. This question has 4 part(s).
1.1. A student carried out a titration using sodium hydroxide and hydrochloric acid.
Their method is written below.
A | Add a few drops of phenolphthalein |
B | Add the HCl slowly until the endpoint is reached |
C | Add HCl into the burette and record initial volume |
D | Pipette 25 cm3 of NaOH into a conical flask |
E | Record the volume of acid added |
Put the statements A, B, C, D, E in the correct order.
The first step has been done for you.
first step | last step | |||
C |
1.2. What colour change will be observed when the end point is reached? Tick one box.
Red to yellow | |
Pink to colourless | |
Colourless to pink | |
Yellow to red |
1.3. Why can universal indicator not be used to show the end point in a titration?
1.4. Separate: Chemistry Only
A measuring cylinder could have been used to measure 25 cm3 of sodium hydroxide. Give one advantage of using a pipette
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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