Solutions Subwork

Which product in the equation below is a precipitate?

AlCl₃ (aq) + K₃PO₄ (aq) --> KCl (?) + AlPO₄ (?)

• Both KCl and AlPO₄

• Neither KCl or AlPO₄

• KCl only

• AlPO₄ only

Why is water considered a polar molecule?

• it resists temperature changes

• it has equal sharing of electrons and the atoms in the molecule do not have partial charges

• it has unequal sharing of electrons and the atoms in the molecule do have a slightly positive and negative charge

• water can conduct electricity

Which of the following is soluble in water?

• Fe(NO₃)₂

• Fe₃(PO₄)₂

• Fe(OH)₂

• FeCO₃

Which of the following is insoluble in water at 25 °C?

• MgCrO₄

• Na₂S

• (NH₄)₂CO₃

• Ca(OH)₂

Above shows a KCl crystal that has been placed in water. What can be concluded from the diagram?

• The Cl ions are attracted to the positive hydrogen in water

• The Cl ions are attracted to the negative oxygen in water

• The K ions are attracted to the positive hydrogen in water

• The ions are equally attracted to both the atoms in the water molecules

MgCl₂ is considered a strong electrolyte. Which of the following is true?

• it is an ionic compound and will be a poor conductor of electricity

• it is a covalent compound and will be a poor conductor of electricity

• it is an ionic compound and will be a good conductor of electricity

• it is a covalent compound and will be a good conductor of electricity

Which answer choice best describes the diagram:

• Solution A is a strong electrolyte and Solution B is a nonelectrolyte.

• Solution A is a weak electrolyte and Solution B is a strong electrolyte.

• Solution A is a strong electrolyte and Solution B is a weak electrolyte.

• Solution A is a nonelectrolyte and solution B is a weak electrolyte.

Tags

NGSS.HS-PS2-5

Water is a molecule with slightly positive hydrogen atoms and a slightly negative oxygen atom. This unique arrangement gives water its —

• conductivity properties

• polarity

• electrolytic properties

• nonpolarity

Which compound is soluble in water?

• K₂S

• FeS

• Ag₂S

• CuS

Which of the following compounds is insoluble in water?

• Li₂SO₄

• Ag₃PO₄

• KClO₃

• NaOH