a) The figure below illustrates the titration curve for 50.00 mL of 0.100 M Na¿CO3 with 0.100 M HCI, which indicator should be used in this experiment and why? 14.0- 12.0 10.0- Common pH indicators and their color changes Phenolphthalein 8.0 6.0 Bromthymol blue 4.0 2.0- 0.0 0.00 20.00 40.00 60.00 80.00 100.00 120.00 Methyl red p0 140.00 Bromocresol green Volume of titrant Methyl orange Crystal violet 0 2 4 6 8 10 12 14 pH value b) A sample of 0.53 g Na;CO3 is added to 50ml of HCIO4 (X mol/L) then heat is applied for the reaction. After the reaction happens completely, the excess of HCIO4 is continued to be titrated with 15ml of NaOH (Y mol/L). Known that in a separated experiment, 30 ml HCIO4 (X mol/L) can completely neutralize 25ml NaOH (Y mol/L). What is the value of X and Y?
a) The figure below illustrates the titration curve for 50.00 mL of 0.100 M Na¿CO3 with 0.100 M HCI, which indicator should be used in this experiment and why? 14.0- 12.0 10.0- Common pH indicators and their color changes Phenolphthalein 8.0 6.0 Bromthymol blue 4.0 2.0- 0.0 0.00 20.00 40.00 60.00 80.00 100.00 120.00 Methyl red p0 140.00 Bromocresol green Volume of titrant Methyl orange Crystal violet 0 2 4 6 8 10 12 14 pH value b) A sample of 0.53 g Na;CO3 is added to 50ml of HCIO4 (X mol/L) then heat is applied for the reaction. After the reaction happens completely, the excess of HCIO4 is continued to be titrated with 15ml of NaOH (Y mol/L). Known that in a separated experiment, 30 ml HCIO4 (X mol/L) can completely neutralize 25ml NaOH (Y mol/L). What is the value of X and Y?
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:a) The figure below illustrates the titration curve for 50.00 mL of 0.100 M N22CO3 with 0.100 M HCI, which
indicator should be used in this experiment and why?
14.0
12.0
Common pH indicators and their color changes
10.0
Phenolphthalein
8.0
6.0
4.0
Bromthymol blue
2.0
Methyl red
0.0
0.00
Bromocresol green
20.00
40.00 60.00 80.00 100.00 120.00 140.00
Volume of titrant
Methyl orange
Crystal violet
O 2 4 6 8
10
12
14
pH value
b) A sample of 0.53 g Na2CO3 is added to 50ml of HCIO4 (X mol/L) then heat is applied for the reaction. After
the reaction happens completely, the excess of HCIO4 is continued to be titrated with 15ml of NaOH (Y mol/L).
Known that in a separated experiment, 30 ml HCIO4 (X mol/L) can completely neutralize 25ml NaOH (Y
mol/L). What is the value of X and Y?
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