Question

explain what is wrong in each of the following diagrams and tell how to correct it.

figure 3.

1. error

correction

figure 4.

1. error

correction

figure 5.

1. error

correction

Explanation:

Figure 3:

The person is holding a beaker at the top while stirring, which can cause the beaker to tip over, and they are not using a proper support for the beaker.

Figure 4:

The person is holding a graduated cylinder by the bottom, which can cause inaccurate volume readings and risk breaking the cylinder; also, they are not viewing the meniscus at eye level.

Figure 5:

The person is holding a glass container (likely a test tube) with their bare hands close to the top, which is unsafe if the container has hot or corrosive substances, and they are not using proper gripping technique.

Answer:

1. Error: Beaker held at top, no base support

Correction: Place beaker on a flat lab stand/table, hold it near the base when stirring.

1. Error: Graduated cylinder held at bottom, eye level wrong

Correction: Hold graduated cylinder at the mid-section, view the liquid meniscus at eye level to read volume accurately.

1. Error: Glass container held bare-handed at top

Correction: Use a test tube holder or grip the container near the base, avoid bare-hand contact if the container has hazardous materials.