PRE-LAB EXERCISE Create a table of reagents Write a purpose for this lab Calculate the volume of 1.0 M sodium hydroxide needed to prepare 100 mL of a 0.10 M solution. Calculate the mass of KHP needed to react completely with 25 mL of a 0.10 M NaOH solution. Consider the reaction equation to be as shown below. HP– (aq) + (aq) H2O(l) + P2– (aq) → Procedure Obtain and wear goggles. Measure out the volume of 1.0 M NaOH needed to prepare 100 mL of a 0.10 M solution and add it to the 100 mL volumetric flask. Dilute with distilled water to 100 mL. CAUTION: Sodium hydroxide solution is caustic. Avoid spilling it on your skin or clothing. Connect the pH Sensor to of the Vernier computer interface. Lower the Drop CH 1 Counter onto a ring stand and connect its cable to of the interface (see DIG/SONIC 1 Figure 2). Figure 2 Start the Logger program on your computer. Open the from Pro file “06b NaOH(Drop)” the folder. Advanced Chemistry with Computers Measure out the mass of KHP that will completely neutralize 10 mL of 0.10 M NaOH solution. Dissolve the KHP in about 40 mL of distilled water in a 100 mL beaker.
PRE-LAB EXERCISE Create a table of reagents Write a purpose for this lab Calculate the volume of 1.0 M sodium hydroxide needed to prepare 100 mL of a 0.10 M solution. Calculate the mass of KHP needed to react completely with 25 mL of a 0.10 M NaOH solution. Consider the reaction equation to be as shown below. HP– (aq) + (aq) → H2O(l) + P2– (aq) Procedure Obtain and wear goggles. Measure out the volume of 1.0 M NaOH needed to prepare 100 mL of a 0.10 M solution and add it to the 100 mL volumetric flask. Dilute with distilled water to 100 mL. CAUTION: Sodium hydroxide solution is caustic. Avoid spilling it on your skin or clothing. Connect the pH Sensor to CH 1 of the Vernier computer interface. Lower the Drop Counter onto a ring stand and connect its cable to DIG/SONIC 1 of the interface (see Figure 2). Figure 2 Start the Logger Pro program on your computer. Open the file “06b NaOH(Drop)” from the Advanced Chemistry with Computers folder. Measure out the mass of KHP that will completely neutralize 10 mL of 0.10 M NaOH solution. Dissolve the KHP in about 40 mL of distilled water in a 100 mL beaker.
06%20NaOH%20lab.docx