Question

when amanda poured some of the liquid in a test tube, she noticed that the edges of the water curved upward, which is an example of. when pol filled another test tube to the top, the liquid formed a low dome, which is evidence of. when amanda added table salt to the first test tube and shook it, she noted that the liquid had dissolved the. all of these observations indicated the presence of bonds. pol determined that the ph of the sample is 7, which shows the sample is. based on all of the evidence amanda and pol gathered, the unknown liquid is

Explanation:

• Adhesion: When the edges of the water curve upward in a test - tube, it is due to the attraction between water molecules (cohesion) and the molecules of the test - tube (adhesion). Adhesion causes the water to “climb” up the sides of the container.
• Cohesion: When the liquid forms a low dome when filled to the top of a test - tube, it is because of cohesion. Cohesion is the attraction between like molecules (in this case, water molecules). The cohesive forces hold the water molecules together, creating the dome - like shape.
• Solvent property: When table salt (solute) is dissolved in the liquid (water, which is the solvent), it shows the solvent property of water. Water is a universal solvent due to its polar nature.
• Polar covalent: Water has polar covalent bonds. The oxygen atom has a higher electronegativity than hydrogen, creating a dipole (partial positive on hydrogen and partial negative on oxygen). This polarity is responsible for many of water's properties like adhesion, cohesion, and its ability to act as a solvent.
• Neutral: A pH of 7 is considered neutral. On the pH scale, values less than 7 are acidic and values greater than 7 are basic.
• Water: Based on all the properties (adhesion, cohesion, solvent property, neutral pH, and the presence of polar covalent bonds), the unknown liquid is water.

Answer:

1. Adhesion
2. Cohesion
3. Solvent property
4. Polar covalent
5. Neutral
6. Water