amanda and pal were in science lab, trying to identify a colorless liquid. their observations were as follows: 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 blank. when pal filled another test tube to the top, the liquid formed a low dome, which is evidence of blank. when amanda added table salt to the first test tube and shook it, she noted that the liquid had dissolved the blank. all of these observations indicated the presence of blank bonds. pal determined that the ph of the sample is 7, which shows the sample is blank. based on all of the evidence amanda and pal gathered, the unknown liquid is blank.

Question

Accepted Answer

### First blank (Amanda's observation - curved water edges):
- **Explanation**: The upward curving of water edges in a test tube is due to adhesion (attraction between water and the test tube's surface).
- **Answer**: adhesion

### Second blank (Pal's observation - liquid dome):
- **Explanation**: A liquid forming a dome in a test tube (when filled to the top) is due to cohesion (attraction between liquid molecules, here water molecules).
- **Answer**: cohesion

### Third blank (presence of bonds from observations):
- **Explanation**: Water has covalent bonds (sharing of electrons between H and O in H₂O). The observations (adhesion, cohesion, dissolving salt) relate to water's properties, which involve covalent bonds in the water molecule.
- **Answer**: covalent

### Fourth blank (dissolved substance - solute or solvent?):
- **Explanation**: When salt (solute) is added to water (solvent), the water dissolves the salt (solute). So the liquid (water) dissolves the solute (salt).
- **Answer**: solute

### Fifth blank (pH = 7 indicates?):
- **Explanation**: A pH of 7 is neutral (neither acidic nor basic).
- **Answer**: neutral

### Sixth blank (unknown liquid identity):
- **Explanation**: The observations (adhesion, cohesion, dissolving salt, neutral pH) all point to water. Vinegar is acidic (pH < 7), hydrogen is a gas, etc. Water matches all these properties.
- **Answer**: water

### Final Answers (in order of blanks):
1. adhesion
2. cohesion
3. covalent
4. solute
5. neutral
6. water

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QUESTION IMAGE

Question

Explanation:

First blank (Amanda's observation - curved water edges):

Second blank (Pal's observation - liquid dome):

Third blank (presence of bonds from observations):

Fourth blank (dissolved substance - solute or solvent?):

Fifth blank (pH = 7 indicates?):

Sixth blank (unknown liquid identity):

Final Answers (in order of blanks):

Answer: