Titration of bleach report template PDF

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Principles of Chemistry 2: Titration of Bleach

Name: Nomin Davaanyam, Dante Badalich Lab Section: 01 Date: 03/21/2019

Use excess significant figure figuress at all times unless aasked sked to round. Molar mass NaClO = 74.441713 g/mol

mass of KIO3 (g) total moles of KIO3

Trial 1

Trial 2

0.5050

0.5050

0.002359802233

0.002359802233

9.439208932* 10−3

concentratio concentration n KIO3 solution (M) volume KIO3 titr titrated(mL) ated(mL)

9.439208932* 10−3

10.00

10.00

9.439208932* 10−5

*A* moles of KIO3 titrated

9.439208932* 10−5

Initial Burette R Reading eading (mL)

0.00

13.00

Final Burette R Reading eading (mL)

13.58

26.41

Volume Na2S2O3 dispensed (mL)

13.58

13.41

moles Na2S2O3 (calculated from *A*)

5.663525359* 10−4

5.663525359* 10−4

Concentratio Concentration n Na2S2O3 (M)

4.170489955* 10−2

4.223359701* 10−2

4.196924828* 10−2

*B*Ave *B*Average rage Na2S2O3 concentr concentra a tion

M

Use excess significant figures at all times unless aske asked d to round. Molar mass NaClO = 74.441713 g/mol Trial 1

Trial 2

Mass of Bleach used (g)

0.651

0.6217 0.6217

Initial Buret R Reading eading (mL)

24.00

5.00

Final Buret R Reading eading (mL)

44.71

26.10

Volume Na2S2O3 dispensed (mL)

20.71

21.10

Concentratio Concentration n of Na2S2O3 (use *B*)

*C* moles Na2S2O3 Moles ClO- titr titrated ated (Use *C* ) Mass NaClO (g) in sampl sample e Mass % NaClO Ave Average rage Mass % (Rou (Round nd only here with correct significant figures)

4.196924828* −2

10

8.691831319*

10−4 4.34591566* 10−4 3.2351741* 10−2

4.196924828* 10−2

8.691831319* 10−4 4.427755694* 10−4 −2

3.2960972* 10

4.924161435

5.301748731 5.113 %

mass % NaClO = mass NaC NaClO lO/mass bleach x 100%

Show your calculations neatly below. Hand written calculations are acceptable. (Attach additional pages as needed)...