Questions from General Chemistry

Q: Calculate the percent by mass of solute in each of the following

Calculate the percent by mass of solute in each of the following solutions. a. 2.14 g of potassium chloride dissolved in 12.5 g of water b. 2.14 g of potassium chloride dissolved in 25.0 g of water...

Q: A(n) solution contains a conjugate acid–base pair

A(n) solution contains a conjugate acid–base pair and through this is able to resist changes in its pH.

Q: In each of the following chemical equations, identify the conjugate acid

In each of the following chemical equations, identify the conjugate acid–base pairs. a. HF(aq) + H2O(l) ⇌ F-(aq) 1 H3O+(aq) b. CN-(aq) + H2O(l) ⇌ HCN(aq) + OH-(aq) c. HCO3-(aq) + H2O(l) ⇌ H2CO3(aq)...

Q: Of the following combinations, which would act as buffered solutions?

Of the following combinations, which would act as buffered solutions? a. HClO2 and KClO2 b. H2S and Na2S c. HCOOH and NaHCO d. HClO and HClO4

Q: Calculate the pH corresponding to each of the pOH values listed,

Calculate the pH corresponding to each of the pOH values listed, and indicate whether each solution is acidic, basic, or neutral. a. pOH = 4.32 b. pOH = 8.90 c. pOH = 1.81 d. pOH = 13.1

Q: Write the equilibrium expression for each of the following heterogeneous equilibria.

Write the equilibrium expression for each of the following heterogeneous equilibria. a. 4Al(s) + 3O2( g) ⇌ 2Al2O3(s) b. NH3( g) + HCl( g) ⇌ NH4Cl(s) c. 2Mg(s) + O2( g) ⇌ 2MgO(s)

Q: Write the equilibrium expression for each of the following heterogeneous equilibria.

Write the equilibrium expression for each of the following heterogeneous equilibria. a. P4(s) + 5O2( g) ⇌ P4O10(s) b. CO2( g) + 2NaOH(s) ⇌ Na2CO3(s) + H2O( g) c. NH4NO3(s) ⇌ N2O( g) + 2H2O( g)

Q: Suppose the reaction system 2NO(g) + O2(

Suppose the reaction system 2NO(g) + O2(g) ⇌ 2NO2(g) has already reached equilibrium. Predict the effect of each of the following changes on the position of the equilibrium. Tell whether the equilibr...

Q: The reaction PCl3(l) + Cl2(g)

The reaction PCl3(l) + Cl2(g) ⇌ PCl5(s) liberates 124 kJ of energy per mole of PCl3 reacted. Will an increase in temperature shift the equilibrium position toward products or toward reactants?

Q: For the process CO(g) + H2O(g

For the process CO(g) + H2O(g) ⇌ CO2(g) + H2(g) it is found that the equilibrium concentrations at a particular temperature are [H2] = 1.4 M, [CO2] = 1.3 M, [CO] = 0.71 M, and [H2O] = 0.66 M. Calcu...