General Chemistry Answers

Determine the specific heat of lead if :​

a- A 150 g sample of lead is heated to the temperature of boiling water (100 oC).​

b- A 50 g sample of water is added to a thermally isolated beaker, and its temperature is found to be 20 oC.​

c- The hot lead is dumped into cold water, and the final lead-water mixture has a temperature of 28.8 oC.

How many grams of potassium iodide are needed to make 4 liters of a .2 m solution of potassium iodide in water?

Mikaela is a STEM student who is currently having her General Chemistry 2 subject. Today, she is asked by her teacher to prepare CuSO4 solution. Help her do her task by following the procedure and answering the questions below.

1. Obtain sample of CuSO4 from the front bench.

2. Using your scale, weigh out 18g of CuSO4

3. Dissolve the 18g of CuSO4 in 100 ml of distilled water

4. Stir until you have reached a homogeneous solution with all the solute dissolved is the solvent.

Calculate the concentration of your solution (M in mol/L of CuSO4).

Balance the following redox reactions by the oxidation state change method.

K₂Cr₂O₇+FeSO₄+H₂SO₄→K₂SO₄+Cr₂(SO₄)₃+Fe₂(SO₄)+H₂O

Values between 1 and 14 describes the pH scale. Mathematically, pH can be determined from the [H3O+] using the following expression:

pH= - log [H3O+].

1). What is the molarity of hydronium ions in a solution that has a pOH of 9.6?

2).what is the type of pH displayed by the solution?

3). Which of the following equation describe the pH as a measure of acidity?

a. a-Solvent = - log [solvent]

b. a-Solute = -log [solute]

c. p-solute = -log [solute]

d. p-solvent = - log [solvent]

1. Calculate the pH and pOH of a solution with hydronium ion concentration of 2.5×10^-4 M.

2. The pH of a solution is 12.5. What are the hydronium ion and hydroxide ion concentrations in this solution?

Given equilibrium system : PCl_5(g)←→PCl_3(g)+Cl_2(g). what will be the direction of the shift in equilibrium if PCl₃ is added to the system?if Cl₂ is removed from the system?

Determine if a precipitation reaction occurs between aqueous silver nitrate and aqueous calcium chloride. If a precipitation reaction takes place, write a balanced chemical equation, total ionic equation and net ionic equation for the reaction. Identify any spectator ions.

if you have 4 moles of H2 gas and 4 moles of O2 gas, which is your limiting reactant

K= 1.44 at 1000 K for synthesis gas reaction:

CO_(g)+H₂O←→CO_2(g)+H_2(g)

If initially the gases are introduced into an empty vessel at a partial pressure at 1.0 ATM each,what will be the equilibrium pressure of each gas?