The solubility of

$$\mathrm { MnSO } _ { 4 } \cdot \mathrm { H } _ { 2 } \mathrm { O }$$

in water at

$$20 ^ { \circ } \mathrm { C }$$

is 70 g per 100 mL of water. Given a solution of

$$\mathrm { MnSO } _ { 4 } \cdot \mathrm { H } _ { 2 } \mathrm { O }$$

of unknown concentrati on, what experiment could you perform to determine whether the new solution is saturated, supersaturated, or unsaturated?

The solubility of

$$\mathrm { MnSO } _ { 4 } \cdot \mathrm { H } _ { 2 } \mathrm { O }$$

in water at

$$20 ^ { \circ } \mathrm { C }$$

is 70 g per 100 mL of water. Is a 1.22 M solution of

$$\mathrm { MnSO } _ { 4 } \cdot \mathrm { H } _ { 2 } \mathrm { O }$$

in water at

$$20 ^ { \circ } \mathrm { C }$$

saturated , supersaturated, or unsaturated?

Indicate the type of solute-solvent interaction that should be most important in each of the following solutions: HCI in acetonitrile

$$(CH_3CN).$$

Tell whether the quotient is positive or negative without dividing. 5. 12 ÷ 4

Solve. 3y + 4y + 6 = 20

Indicate the principal type of solute-solvent interaction in each of the following solutions and rank the solutions from weakest to strongest solute-solvent intera ction:

$$CH_2Cl_2$$

in benzene

$$(C_6H_6)$$

Indicate the principal type of solute-solvent interaction in each of the following solutions and rank the solutions from weakest to strongest solute-solvent intera ction: methanol

$$(CH_3OH)$$

in water.

Explain how to write terms of a sequence if the formula for the general term is given.

Indicate the principal type of solute-solvent interaction in each of the following solutions and rank the solutions from weakest to strongest solute-solvent interaction: KCl in water.

Indicate whether each statement is true or false: NaCl dissolves in water but not in benzene because water has a large dipole moment and benzene has zero dipole moment.

Use this list of multiples of 15 to answer the following questions: $$ \begin{array} { 15 } & { 30 } & { 45 } & { 60 } & { 75 } & { 90 } & { 105 } & { 120 } & { 135 } & { 150 } \end{array} $$ State the numbers which are common multiples of both a. 15 and 10 b. 15 and 9 c. 20 and 30 d. 4 and 30

Indicate whether each statement is true or false: NaCl dissolves in water but not in benzene $(C_6H_6)$ because benzene is denser than water.

Indicate whether each statement is true or false: NaCl dissolves in water but not in benzene because the water-ion interactions are stronger than benzene-ion interactions.

KBr is relatively soluble in water, yet its enthalpy of solution is +19.8 kJ/mol. Which of the following statements provides the best explanation for this behavior? The enthalpy of mixing must be small compared to the enthalpies for breaking up water-water interactions and K-Br ionic interactions