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Chemistry130 lab 5 2017.docx

Chemistry130 lab 5 2017.docx - Chemistry130 lab 5 2017 23...

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Chemistry130 lab 5 2017 23 SEPT 2017 CHEM 130 EXPERIMENT 1: STUDY THE CONSERVATION OF MASS IN A SOLUTION REACTION. 88.000ML - MASS OF FIRST EMPTY ERLENMEYER FLASK (EF) ON BALANCE. (RETURN THE EF TO THE WORKBENCH.) 50.00ML - VINEGAR ADDED TO EF. 138.133ML - MASS OF VINEGAR IN EF ON BALANCE. 50.133ML - MASS OF VINEGAR MINUS MASS OF E.F. 88.000ML- MASS OF 2ND EF OF EMPTY EF ON BALANCE. (PLACE 2ND EF ON WORKBENCH) 50.00ML- SODIUM HYDROXIDE (NaOH) ADDED IN EF. 139.061ML - MASS OF NaOH IN EF ON BALANCE. 51.061ML - MASS OF NaOH minus MASS OF E.F. 21.50 - INITIAL TEMPERATURE OF VINEGAR IN EF AFTER PLACING THERMOMETER IN EF. 50.00ML - NaOH ADDED TO 1ST EF WITH VINEGAR THE LEVEL OF CONTENT INCREASED IN THE EF BUT NO COLOR CHANGE OR ANY OTHER UNUSUAL OBSERVATION OCCURED (27.00 TEMP and started to go down) 189.194ML- MASS OF EF WITH VINEGAR AND NaOH ON BALANCE. - minus 88.000ML - MASS OF E.F. = 101.194 ML =COMBINED MASS OF VINEGAR AND NaOH 189.194ML - MASS OF VINEGAR mixed with NaOH IN EF AFTER ONE MINUTE ( THE SAME MASS) ---------------------------------------------- EXPERIMENT 2: STUDY THE CONSERVATION OF MASS IN A GAS FORMATION REACTION 88.179ML - MASS OF CLOSED E.F. ON BALANCE
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88.000ML - MASS OF OPENED E.F. ON BALANCE 20.00ML - WATER ADDED TO E.F. 108.000ML - MASS OF 20ML WATER IN OPENED E.F. 20.00ML - MASS OF WATER IN THE E.F. 108.155ML - MASS OF WATER IN CLOSED E.F. ON BALANCE 2.000G - ALKA SELTZER ADDED IN CLOSED E.F.
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