Chem Lab

A:

A laboratory spatula is used for mixing, spreading and holding chemicals in a laboratory. In most cases, spatulas are made of stainless steel to prevent corrosion and provide clean mixing. However, certain spatula implements are made using rubber and polymers such as nylon.

See Full Answer
Filed Under:
  • What is the function of a test tube holder and a test tube rack?

    Q: What is the function of a test tube holder and a test tube rack?

    A: A test tube holder's purpose is for holding test tubes in place, but they can also be useful for holding pipettes and stirring rods as well, and a test tube rack holds multiple test tubes in place. Some test tube racks can hold up to 40 test tubes. There are other racks designed for storing test tubes and holding even larger numbers of test tubes during a long period of time.
    See Full Answer
    Filed Under:
  • What is the temperature of a blue flame?

    Q: What is the temperature of a blue flame?

    A: The temperature of a blue flame depends on what is on fire. A burning chemical or metal may display a blue color only after reaching a particular temperature, but that threshold can vary.
    See Full Answer
    Filed Under:
  • What is a thermometer used for?

    Q: What is a thermometer used for?

    A: A thermometer is used to measure the temperature of different materials or substances. It can be used for solids, liquids or even gases.
    See Full Answer
    Filed Under:
  • Does salt affect the freezing point of water?

    Q: Does salt affect the freezing point of water?

    A: Salt lowers the freezing point of water. The freezing point of water is the temperature at which water transitions from liquid to solid phase. The freezing point of water is 0 degrees centigrade in ordinary conditions. However, if supercooling occurs or if the water contains impurities, the freezing point can go down.
    See Full Answer
    Filed Under:
  • How does an electron microscope work?

    Q: How does an electron microscope work?

    A: Electron microscopes use high-speed electrons in a vacuum to form images of samples. Since electrons have a much smaller wavelength than light, electron microscopes have greater resolution than light microscopes.
    See Full Answer
    Filed Under:
  • How do you separate nitrogen and oxygen?

    Q: How do you separate nitrogen and oxygen?

    A: There are several ways of separating nitrogen and oxygen. The first involves cooling the mixture down to -200 degrees Celsius and separating the gases using a process called fractional distillation. Alternatively, the gases can be cooled down to -182.95 C, the liquefaction point of oxygen. At this temperature, the oxygen in the mixture gets liquefied, while the nitrogen remains in its gaseous form, because nitrogen liquefies at -196 C.
    See Full Answer
    Filed Under:
  • What is the use of crucible tongs?

    Q: What is the use of crucible tongs?

    A: Crucible tongs are tools that can be used in either a laboratory setting or an industrial setting. In both cases, the tongs are used to safely move a piece of equipment called a crucible that contains potentially dangerous materials that must be handled very carefully.
    See Full Answer
    Filed Under:
  • What is the function of a test tube?

    Q: What is the function of a test tube?

    A: The function of a test tube is to hold, mix or heat small quantities of liquid or solid chemicals for assays and qualitative experiments. Test tubes also serve as temporary storage for chemicals to be used in chemical experiments.
    See Full Answer
    Filed Under:
  • What is the function of a beaker?

    Q: What is the function of a beaker?

    A: The purpose of a beaker is to hold various types of liquids. A beaker often has a wide bottom and a narrow top. Beakers are typically used in laboratories and schools so that scientists and students are able to work with chemicals safely and easily.
    See Full Answer
    Filed Under:
  • What is the meaning of an investigatory project?

    Q: What is the meaning of an investigatory project?

    A: An investigatory project is a project that tries to find the answer to a question by using the scientific method. According to About.com, science-fair projects are usually investigatory projects.
    See Full Answer
    Filed Under:
  • What is a Petri dish?

    Q: What is a Petri dish?

    A: A Petri dish is a shallow dish that is used to culture microorganisms. By mixing different ingredients, such as blood, salts, amino acids or bacteria, together with an agar (or medium), scientists are able to observe reactions and watch microorganisms grow and develop.
    See Full Answer
    Filed Under:
  • How do you test gold at home?

    Q: How do you test gold at home?

    A: By American standards, fake gold is anything less than 10 karats. If you're wondering if your gold is real, the most reliable way to find out is to take it to a certified jeweler and have it tested. If you want to check for yourself, use these instructions to make that determination.
    See Full Answer
    Filed Under:
  • What is a laboratory thermometer?

    Q: What is a laboratory thermometer?

    A: A laboratory thermometer is a tool used in laboratories to measure temperature with a high level of accuracy. It can be partially or fully immersed in the substance being measured. A laboratory thermometer is recognizable by its long stem with a silver bulb at the end.
    See Full Answer
    Filed Under:
  • What is the purpose of a microscope?

    Q: What is the purpose of a microscope?

    A: The microscope is a device used to view very small objects by magnifying the image. This can be done through optical and non-optical means.
    See Full Answer
    Filed Under:
  • What are the uses of a laboratory spatula?

    Q: What are the uses of a laboratory spatula?

    A: A laboratory spatula is used for mixing, spreading and holding chemicals in a laboratory. In most cases, spatulas are made of stainless steel to prevent corrosion and provide clean mixing. However, certain spatula implements are made using rubber and polymers such as nylon.
    See Full Answer
    Filed Under:
  • What is a diaphragm on a microscope?

    Q: What is a diaphragm on a microscope?

    A: A diaphragm on a microscope is the piece that enables the user to adjust the amount of light that is focused under the specimen being observed. A diaphragm is typically found on higher-power microscopes versus less expensive or toy models.
    See Full Answer
    Filed Under:
  • What are sources of error in a chemistry lab?

    Q: What are sources of error in a chemistry lab?

    A: Errors in the chemistry lab can arise from human error, equipment limitations and observation errors. Some other sources of errors include measurement values that are not well defined and inconsistent experiment techniques.
    See Full Answer
    Filed Under:
  • What is the function of glass rod?

    Q: What is the function of glass rod?

    A: A glass stirring rod is a common piece of lab equipment used to mix or stir liquids and chemicals. These rods are thicker than a typical drinking straw, have rounded ends and are made from a special type of laboratory glassware called borosilicate. This glass is less affected by thermal stress and has a very low thermal expansion point, so it is less affected by heat than metals are.
    See Full Answer
    Filed Under:
  • What is the function of a test tube brush?

    Q: What is the function of a test tube brush?

    A: The function of a test tube brush is the clean test tubes used in a science laboratory. Test tube brushes are also useful in cleaning aquarium tanks. They consist of twisted wire handles connected to bristles that are made of Nylon or a similar material such as Tynex.
    See Full Answer
    Filed Under:
  • What is a laboratory observation?

    Q: What is a laboratory observation?

    A: Laboratory observations, as used in the social sciences, bring study subjects into a laboratory setting to complete research. While the laboratory observation gives greater control over the subjects, it has the potential of introducing variables that do not exist in the real world. Laboratory observations allow researchers to gather data more efficiently than they are able to do in the natural environment.
    See Full Answer
    Filed Under:
  • How does a light microscope work?

    Q: How does a light microscope work?

    A: A light microscope uses a focused beam of visible light to magnify objects for observation. It works in a similar way as a refracting telescope but with several minor differences. A telescope uses a large objective lens, because it needs large amounts of light to bring a dim, distant object to a bright focus. On the other hand, a light microscope does not need a large objective lens because it only needs to acquire light from a small area of a thin, close specimen that is well illuminated.
    See Full Answer
    Filed Under: