Water

A solvent is...

• substance into which the solute dissolves
• a compound being dissolved
• a substance that does not dissolve
• None of the above

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Which types of compounds dissolve easily in water?

• Polar and Nonpolar
• Polar and Ionic
• Nonpolar and Ionic
• Covalent and Nonpolar

Tags

NGSS.HS-ESS2-5

Which type of water makes soaps not work? 

• Hard 
• Soft 

Tags

NGSS.HS-PS1-5

substance on exposure to the atmosphere absorbs moisture and changes into liquid

• deliquescent

• efflorescent

• hygroscopic

• dehydrating agent

Cause of efflorescence

• It occurs when the vapour pressure of the solution that is formed is less than the partial pressure of water vapour in the air. All soluble salts will deliquesce if the air is sufficiently humid.

• It occurs when the vapour pressure of the hydrated crystals exceeds the vapour pressure of the atmospheric humidity. This leads to its moisture to go from a higher pressure environment to a much lower pressure environment being the atmosphere

Tags

NGSS.HS-ESS2-5

an example for deliquescent substance

• FeCl3

• NaCl

• KCl

• CuSO4

Tags

NGSS.MS-PS1-4

The residue of CuSO4.5H2O is

• CuSO4

• CuSO4.H2O

• CuSO4.3H2O

Which of the following substances is the most soluble in water?

• potassium chloride

• methane

• bromine

• carbon

Tags

NGSS.HS-ESS2-5

Hardness in water is caused by the presence of:

• Sodium chloride

• Sodium carbonate

• Calcium chloride

• Potassium nitrate