8/12/2019 Chemistry Investigation 2 (Practice 1)

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Chemistry Investigation 2

Data Collection

Volume of pipetted aqueous sodium hydroxide used =  

Titration of aqueous sodium hydroxide against dilute hydrochloric acid:

Titration Number 1 2 3 4

Final volume of dilute hydrochloric

acid/cm3 (±0.05 cm

2)

18.50 19.20 18.40 18.45

Initial volume of dilute hydrochloric

acid/cm3 (±0.05 cm

2)

0.00 0.00 0.00 0.00

Volume of dilute hydrochloric acid

used/cm3 (±0.10 cm

2)

18.50 19.20 18.40 18.45

Titration used      

Data Processing

Chemical Equation: NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (l) 

Calculations

Average volume of dilute hydrochloric acid used

 

 cm3 

Amount of HCl in 18.45 cm3 of dilute

hydrochloric acid

 

 mol

Mole ratio of Dilute HCl to NaOH is 1:1

Amount of NaOH used

 mol

Propagation of uncertainties

 average volume of dilute hydrochloric acid

used

 

cm3

 concentration of aqueous sodium

hydroxide

(

) 

 

Absolute uncertainty

 

 mol/dm3

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Concentration of aqueous sodium hydroxide

used

 

 mol/dm3 

 Concentration of aqueous sodium hydroxide

 mol/dm3