If some of the KHP was spilled on the balance pan while weighing, how will the c
ID: 948769 • Letter: I
Question
If some of the KHP was spilled on the balance pan while weighing, how will the calculated molarity of the NaOH be affected (too low, too high, unaffected)? Explain. If 50 mL of distilled water were used instead of 30 mL in dissolving the KHP, how will the calculated molarity of the NaOH be affected (too low, too high, unaffected)? Explain. If a student had a leaky buret, and some of the NaOH from the buret missed the flask, how would the calculated molarity of NaOH be affected (too low, too high, unaffected)? Explain. If the NaOH solution is exposed to the atmosphere, will the molarity of NaOH change over time, and if so, how will it change (increase, decrease, no change)/ Explain.Explanation / Answer
Answer – 1) When the KHP was spilled on the balance pan while weighting, then there was found less amount of KHP and it was given less amount of moles and concentration, so there is NaOH also got the less in number and molarity got too low.
2) If 50 mL of distilled water were used instated of 30 mL in dissolving the KHP then there is no effect on the moles of KHP. There were same number of moles KHP and it gives same number of moles of NaOH, so molarity of NaOH was unaffected.
3) When the student had a leaky buret and there was some NaOH added in the flask then thre is showing the more volume of NaOH used than actual and it show the too low molarity of NaOH, since we know as the volume increase concentration gets decrease and gets diluted.
4) When we expose the NaOH solution in the atmosphere over the change time then there is molarity gets too low, since NaOH is hydroscopic and absorbed water from the atmosphere and there is volume gets increase and molarity gets low.
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