Which of the following happens when NaCl dissolves in water?
the chloride ions are attracted to the negative end of the water dipole
sodium and chloride ions form covalent bonds with water molecules
the sodium ions are attracted to the negative end of the water dipole
the sodium ions are attracted to the positive end of the water dipole
)
The label on a 750 mL bottle of wine states that its alcohol content is 12%(v/v). How much alcohol is present in the bottle?
Question 2 options:
9 mL
90 mL
120 mL
180 mL
Water is likely to be a poor solvent for which types of molecules?
Question 3 options:
molecules which can form hydrogen bonds
nonpolar molecules
polar molecules
none, water is considered a universal solvent
Which laboratory equipment is needed to prepare solutions of known %(w/v)?
Question 4 options:
a balance
a volumetric flask
both (a) and (b)
neither (a) nor (b)
What is the %(w/w) of a salt solution prepared by dissolving 7.5 g of salt in 242.5 g of water?
Question 5 options:
0.030%
0.30%
0.75%
3.0%
Saline solutions (NaCl in water) used to deliver intravenous drugs are 0.89%(w/v). What weight of NaCl is found in 500 mL of such a solution?
Question 6 options:
0.45 g
0.89 g
4.5 g
8.9 g
the chloride ions are attracted to the negative end of the water dipole
sodium and chloride ions form covalent bonds with water molecules
the sodium ions are attracted to the negative end of the water dipole
the sodium ions are attracted to the positive end of the water dipole
)
The label on a 750 mL bottle of wine states that its alcohol content is 12%(v/v). How much alcohol is present in the bottle?
Question 2 options:
9 mL
90 mL
120 mL
180 mL
Water is likely to be a poor solvent for which types of molecules?
Question 3 options:
molecules which can form hydrogen bonds
nonpolar molecules
polar molecules
none, water is considered a universal solvent
Which laboratory equipment is needed to prepare solutions of known %(w/v)?
Question 4 options:
a balance
a volumetric flask
both (a) and (b)
neither (a) nor (b)
What is the %(w/w) of a salt solution prepared by dissolving 7.5 g of salt in 242.5 g of water?
Question 5 options:
0.030%
0.30%
0.75%
3.0%
Saline solutions (NaCl in water) used to deliver intravenous drugs are 0.89%(w/v). What weight of NaCl is found in 500 mL of such a solution?
Question 6 options:
0.45 g
0.89 g
4.5 g
8.9 g