Science Learning Center Chemistry Pre-laboratory Tutorials

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Science Learning Center Chemistry Pre-laboratory Tutorials Written By Patrick Herklotz.

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Presentation transcript:

Science Learning Center Chemistry Pre-laboratory Tutorials Written By Patrick Herklotz

Menu Options: Click on Links To… Instructions Step # Location of Written Instructions Menu Options: Click on Links To… Previous Slide Link: Go to Preceding Slide Link: Watch Current Slide Animations Again Replay Continue Link: Advance to Next Slide

Calibrating and Operating the Vernier pH Sensor Tutorial 4 Calibrating and Operating the Vernier pH Sensor

Calibrating and Operating the Vernier pH Sensor Tutorial 4 Calibrating and Operating the Vernier pH Sensor Previous Slide Replay Continue

Step 1: Assemble the LabPro Calculator as explained in Tutorial 1 Previous Slide Step 1: Assemble the LabPro Calculator as explained in Tutorial 1 Replay Continue Top View Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > )

Step 1: Assemble the LabPro Calculator as explained in Tutorial 1. Previous Slide Step 1: Assemble the LabPro Calculator as explained in Tutorial 1. Replay Continue Top View Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > )

Previous Slide Step 2: Obtain the pH sensor and plug it into channel 1. Run the DataMate program by selecting it from the APPS menu in order to allow the calculator to detect the pH sensor. Replay Continue Top View Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) Channel 1 Channel 2 Channel 3 Channel 4 Side View

Previous Slide Step 2: Obtain the pH sensor and plug it into channel 1. Run the DataMate program by selecting it from the APPS menu in order to allow the calculator to detect the pH sensor. Replay Continue Top View Power Supply pH SENSOR LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) VERNIER SOFTWARE DATAMATE (VER 1.15) ROM 6.27 (C)2003 Checking Sensors Mode: TIME GRAPH-180 1: SETUP 4: ANALYZE 2: START 5: TOOLS 3: GRAPH 6: QUIT CH 1: Absorbance 0.475 Mode: TIME GRAPH-180 1: SETUP 4: ANALYZE 2: START 5: TOOLS 3: GRAPH 6: QUIT click Channel 1 Channel 2 Channel 3 Channel 4 Channel 1 Port Side View

LabPro Calculator Screen Previous Slide Step 3: In the default DataMate program screen, press the 1 key (SETUP). In the next menu, press 2 (CALIBRATE) once the cursor triangle is to the left of CH 1. In the third menu, press the 2 key (CALIBRATE NOW). Replay Continue Power Supply pH SENSOR LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) Texas Instruments TI-84 Silver Edition CH 1: PH Mode: TIME GRAPH-180 1: SETUP 4: ANALYZE 2: START 5: TOOLS 3: GRAPH 6: QUIT LabPro Calculator Screen

LabPro Calculator Screen Previous Slide Step 3: In the default DataMate program screen, press the 1 key (SETUP). In the next menu, press 2 (CALIBRATE) once the cursor triangle is to the left of CH 1. In the third menu, press the 2 key (CALIBRATE NOW). Replay Continue Power Supply pH SENSOR LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) Texas Instruments TI-84 Silver Edition CH 1: PH Mode: TIME GRAPH-180 1: SETUP 4: ANALYZE 2: START 5: TOOLS 3: GRAPH 6: QUIT CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 2.627 POINT 2: CALIBRATION PH CALIBRATION: LINEAR SLOPE INT 0 4 1:OK 2:CALIBRATE NOW 3:MANUAL ENTRY CH 1: PH CH 2: CH 3: CH 4: DIG1: DIG2: MODE: TIME GRAPH-900 1:OK 3:ZERO 2:CALIBRATE 4:SAVE/LOAD LabPro Calculator Screen

LabPro Calculator Screen Step 4: Remove the pH sensor from the solution bottle that keeps it moist. Thoroughly rinse the pH electrode with DI water over a beaker. Always perform this step before measuring the pH of a new solution. Use a Chemwipe to gently rub off strong bases from the sensor’s electrode after rinsing it with DI water. Previous Slide Replay Continue - Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) pH SENSOR 50 100 150 250 300 0 ml Texas Instruments TI-84 Silver Edition CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 2.627 POINT 2: LabPro Calculator Screen

LabPro Calculator Screen Step 4: Remove the pH sensor from the solution bottle that keeps it moist. Thoroughly rinse the pH electrode with DI water over a beaker. Always perform this step before measuring the pH of a new solution. Use a Chemwipe to gently rub off strong bases from the sensor’s electrode after rinsing it with DI water. Previous Slide Replay Continue - Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) pH SENSOR Rinse pH electrode with DI water from lab squeeze bottles. 50 100 150 250 300 0 ml Texas Instruments TI-84 Silver Edition CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 2.627 POINT 2: LabPro Calculator Screen

LabPro Calculator Screen Step 5: Place the sensor electrode into a buffer that has a pH of 4. Allow the voltage to stabilize to a reasonably constant value out to the hundredth place past the decimal. This may take 10-15 seconds. Once this occurs, press the ENTER key. On the next screen, press the 4 key to input the pH of this buffer into the calculators memory. Press the ENTER Key again. Previous Slide Replay Continue - Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) pH SENSOR 50 100 150 250 300 0 ml pH 4 Buffer Texas Instruments TI-84 Silver Edition CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: POINT 2: LabPro Calculator Screen

LabPro Calculator Screen Step 5: Place the sensor electrode into a buffer that has a pH of 4. Allow the voltage to stabilize to a reasonably constant value out to the hundredth place past the decimal. This may take 10-15 seconds. Once this occurs, press the ENTER key. On the next screen, press the 4 key to input the pH of this buffer into the calculators memory. Press the ENTER Key again. Previous Slide Replay Continue - Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) pH SENSOR 50 100 150 250 300 0 ml pH 4 Buffer Texas Instruments TI-84 Silver Edition CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: POINT 2: 1 ENTER VALUE ? CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 4 1.635 POINT 2: 4 LabPro Calculator Screen 1.635 1.729 1.631

LabPro Calculator Screen Step 6: Rinse the electrode with DI water. Next, place the pH electrode into a buffer that has a pH of 7. Allow the voltage to stabilize to a reasonably constant value out to the hundredths place past the decimal. Once this occurs, press the ENTER key. On the next screen, press the 7 key to input the pH of this buffer into the calculators memory. Press ENTER to complete the calibrating process. Previous Slide Replay Continue - Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) pH SENSOR 50 100 150 250 300 0 ml pH 7 Buffer Texas Instruments TI-84 Silver Edition CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 4 1.635 POINT 2: 7 3.971 LabPro Calculator Screen

The pH sensor is now calibrated! LabPro Calculator Screen Step 6: Rinse the electrode with DI water. Next, place the pH electrode into a buffer that has a pH of 7. Allow the voltage to stabilize to a reasonably constant value out to the hundredths place past the decimal. Once this occurs, press the ENTER key. On the next screen, press the 7 key to input the pH of this buffer into the calculators memory. Press ENTER to complete the calibrating process. Previous Slide Replay Continue - Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) pH SENSOR 50 100 150 250 300 0 ml The pH sensor is now calibrated! pH 7 Buffer Texas Instruments TI-84 Silver Edition CALIBRATION PH CALIBRATION: LINEAR SLOPE INT 819 -21364 1:OK 2:CALIBRATE NOW 3:MANUAL ENTRY 1 ENTER VALUE ? CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 4 1.635 POINT 2: 7 3.971 CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 4 1.635 POINT 2: 7 LabPro Calculator Screen 3.971 4.452 3.976

Step 7: Press the 1 key [OK] to return to the Settings menu Step 7: Press the 1 key [OK] to return to the Settings menu. Press the 1 key [OK] again to return to the main menu. Previous Slide Replay Continue - Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) pH SENSOR 50 100 150 250 300 0 ml Texas Instruments TI-84 Silver Edition CALIBRATION PH CALIBRATION: LINEAR SLOPE INT 819 -21364 1:OK 2:CALIBRATE NOW 3:MANUAL ENTRY

pH reading for a solution Step 7: Press the 1 key [OK] to return to the Settings menu. Press the 1 key [OK] again to return to the main menu. Previous Slide Replay Continue - Power Supply LabPro VERNIER Quick Setup Start/Stop Transfer Vernier STAT PLOT F1 TBLSET F2 FORNAT F3 CALC F4 TABLE F5 Alpha 2ND Mode DEL STAT PRGM COS ( X,T,O,N APPS MATH 7 4 1 8 5 2 . 9 6 3 (-) x + - ÷ Enter X -1 X2 LOG LN STO> ON SIN , VARS CLEAR TAN > ) pH SENSOR 50 100 150 250 300 0 ml Texas Instruments TI-84 Silver Edition CALIBRATION PH CALIBRATION: LINEAR SLOPE INT 819 -21364 1:OK 2:CALIBRATE NOW 3:MANUAL ENTRY CH 1: PH CH 2: CH 3: CH 4: DIG1: DIG2: MODE: TIME GRAPH-900 1:OK 3:ZERO 2:CALIBRATE 4:SAVE/LOAD CH 1: PH 7 Mode: TIME GRAPH-180 1: SETUP 4: ANALYZE 2: START 5: TOOLS 3: GRAPH 6: QUIT pH reading for a solution

Calibrating The pH Sensor: Review of Steps 5-7 Previous Slide Calibrating The pH Sensor: Review of Steps 5-7 Replay Continue Texas Instruments Texas Instruments Texas Instruments TI-84 Silver Edition TI-84 Silver Edition TI-84 Silver Edition CALIBRATION PH CALIBRATION: LINEAR SLOPE INT 0 4 1:OK 2:CALIBRATE NOW 3:MANUAL ENTRY CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 2.627 POINT 2: 1 ENTER VALUE ? 4 (1) Press 2: CALIBRATE NOW (3) Press 4 Key then the ENTER Key (2) Press ENTER key Texas Instruments Texas Instruments Texas Instruments TI-84 Silver Edition TI-84 Silver Edition TI-84 Silver Edition CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 4 1.635 POINT 2: 3.458 2 ENTER VALUE ? 7 CALIBRATION PH CALIBRATION: LINEAR SLOPE INT 819 -21364 1:OK 2:CALIBRATE NOW 3:MANUAL ENTRY (5) Press 7 key then the ENTER key (6) Press 1 twice to return to default menu screen (4) Press ENTER key

Calibrating The pH Sensor: Review of Steps 5-7 Previous Slide Calibrating The pH Sensor: Review of Steps 5-7 Replay Continue Texas Instruments Texas Instruments Texas Instruments TI-84 Silver Edition TI-84 Silver Edition TI-84 Silver Edition CALIBRATION PH CALIBRATION: LINEAR SLOPE INT 0 4 1:OK 2:CALIBRATE NOW 3:MANUAL ENTRY CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 2.627 POINT 2: 1 ENTER VALUE ? 4 (1) Press 2: CALIBRATE NOW (3) Press 4 Key then the ENTER Key (2) Press ENTER key Texas Instruments Texas Instruments Texas Instruments TI-84 Silver Edition TI-84 Silver Edition TI-84 Silver Edition CALIBRATION SENSOR MONITOR VOLTAGE, WHEN STABLE,PRESS [ENTER]. VALUE VOLTAGE POINT 1: 4 1.635 POINT 2: 3.458 2 ENTER VALUE ? 7 CALIBRATION PH CALIBRATION: LINEAR SLOPE INT 819 -21364 1:OK 2:CALIBRATE NOW 3:MANUAL ENTRY (5) Press 7 key then the ENTER key (6) Press 1 twice to return to default menu screen (4) Press ENTER key

End of Tutorial 4 Menu Options Back to Beginning Previous Slide Finished