Laboratory Techniques and Measurements Exercise 1: Length, Temperature, and Mass

Laboratory Techniques and Measurements

Exercise 1: Length, Temperature, and Mass

Data Table 1. Length Measurements.

Object | Length (cm) | Length (mm) | Length (m) |

CD or DVD | | | |

Key | | | |

Spoon | | | |

Fork | | | |

Data Table 2. Temperature Measurements.

Water | Temperature (°C) | Temperature (°F) | Temperature (K) |

Hot from tap | | | |

Boiling | | | |

Boiling for 5 minutes | | | |

Cold from tap | | | |

Ice water – 1 minute | | | |

Ice water – 5 minutes | | | |

Data Table 3. Mass Measurements.

Object | Estimated Mass (g) | Actual Mass (g) | Actual mass (kg) |

Pen or pencil | | | |

3 Pennies | | | |

1 Quarter | | | |

2 Quarters, 3 Dimes | | | |

4 Dimes, 5 Pennies | | | |

3 Quarters, 1 Dime, 5 Pennies | | | |

Key | | | |

Key, 1 Quarter, 4 Pennies | | | |

Questions

A. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason?

B. While heating two different samples of water at sea level, one boils at 102°C and one boils at 99.2oC. Calculate the percent error for each sample from the theoretical 100.0°C.

Exercise 2: Volume and Density

Data Table 4. Liquid Measurements.

| | Mass A | Mass B | Mass B - A | | |

Liquid | Volume (mL) | GraduatedCylinder (g) | GraduatedCylinder with liquid (g) | Liquid (g) | Densityg/mL | % Error |

Water | | | | | | |

Isopropyl alcohol | | | | | | |

Data Table 5. Magnet – Measurement Method.

Object: | Mass (g) | Length (cm) | Width (cm) | Height (cm) | Volume (cm3) | Density (g/cm3) |

Magnet | | | | | | |

Data Table 6. Displacement Method.

Object | Mass (g) | Initial volume of graduated cylinder (mL) | Final volume of graduated cylinder (mL) | Object Volume (mL) | Density (g/mL) |

Magnet | | | | | |

Metal bolt | | | | | |

Data Table 7. Archimedes’ method.

Object | Mass (g)...