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Author Question: Identify the indicator that can be used at the lowest pH. (Read 105 times)

bcretired

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on: Nov 18, 2019

Question 1

The titration of 80.0 mL of an unknown concentration H3PO4 solution requires 126 mL of 0.218 mol L-1 KOH solution. What is the concentration of the H3PO4 solution (in mol L-1)?
◦ 0.114 mol L-1
◦ 0.138 mol L-1
◦ 1.03 mol L-1
◦ 0.343 mol L-1
◦ 0.0461 mol L-1

Question 2

Identify the indicator that can be used at the lowest pH.
◦ thymol blue
◦ alizarin
◦ crystal violet
◦ phenolphthalein
◦ alizarin yellow R
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Marked as best answer by bcretired on Nov 18, 2019

vickyvicksss

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Reply #1 on: Nov 18, 2019
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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bcretired

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Reply 2 on: Nov 18, 2019
Thanks for the timely response, appreciate it

momolu

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Reply 3 on: Yesterday
Excellent

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