Question

specifically calculate the molarity and molality for hydrogen chloride gas dissolved in pure water, at 298K, to produce a hydrochloric acid solution that is 37.0% HCl and density of solution is 1.19 g/mL

( you have to specific tasks, but how many implied tasks are there. Problem requires...)

- Find molarity for HCl(aq)

- Find molality for HCl(aq)

Answer #1

Basis : 100 gm of solution is assumed, mass of HCl is 37% , mass of HCl= 37 gms moles of HCl= mass/molecular weight, Molecular weight of HCl= 36.5 , moles of HCl =37/36.5=1.013moles

Density of the solution = 1.19 g/mol, volume of solution= mas/volume= 100/1.19 ml=84.03ml

Volume of the solution= 84.03/1000 L=0.08403L

Molarity= Moles of HCl/ per liter of solution= 1.013/0.08403=13.44 M

b) Molality = moels of HCl/ kg of water

Amount of water in the solution= 100-37= 63g =63/1000 kg=0.063kg

Molality= moles of HCl/ kg of water= 1.013/0.063=17.93 m

Find the molarity and molality of 37.0 wt % HCl. The density of
the reagent is 1.19 g/mL.

Hydrochloric acid is prepared by bubbling hydrogen chloride gas
through water. What is the concentration in mol/L of a solution
prepared by dissolving 225.0 L of HCl(g) at 37.0°C and
0.8842 atm in 5.250 L of water?

0.60g of hydrogen chloride (HCl) is dissolved in water to make
8.0L of solution. What is the pH of the resulting
hydrochloric acid solution?
0.90g of sodium hydroxide (NaOH) pellets are dissolved in water
to make 4.0L of solution. What is the pH of this solution?

calculate the molarity and molality of concentrated of
hydrochloric acid. The specific gravity of this solution is 1.19
and its weight percent is solution is 36.5%

Manganese reacts with hydrochloric acid to produce manganese(II)
chloride and hydrogen gas. Mn(s)+2HCl(aq) → MnCl2(aq)+H2(g). When
0.605 g Mn is combined with enough hydrochloric acid to make 100.0
mL of solution in a coffee-cup calorimeter, all of the Mn reacts,
raising the temperature of the solution from 23.2 ∘C to 28.7 ∘C.
Find ΔHrxn for the reaction as written. (Assume that the specific
heat capacity of the solution is 4.18 J/g∘C and the density is 1.00
g/mL.)

Manganese reacts with hydrochloric acid to produce manganese(II)
chloride and hydrogen gas.
Mn(s)+2HCl(aq) →
MnCl2(aq)+H2(g)
When 0.615 g Mn is combined with
enough hydrochloric acid to make 100.0 mL of solution in a
coffee-cup calorimeter, all of the Mn reacts, raising the
temperature of the solution from 24.0 ∘C to 28.4 ∘C.
Find ΔHrxn = ? kJ for the reaction as written. (Assume
that the specific heat capacity of the solution is 4.18 J/g∘C and
the density is 1.00 g/mL.)

Aluminum metal reacts with hydrochloric acid to produce hydrogen
gas and aluminum chloride (write a balanced equation). When 1.357 g
of Al(s) is combined with 100.0 mL of 3.00M HCl (aq) in a coffee
cup calorimeter, all of the aluminum reacts, raising the
temperature of the solution from 21.5oC to 38.4oC. Find ΔHrxn in
kJ/mol H2. Assume the density of the solution is 1.00 g/mL and the
heat capacity is 4.184 J/goC. Attach a sheet of paper to show your...

Part A:
0.65 g of hydrogen chloride (HCl) is dissolved in water to make
8.0 L of solution. What is the pH of the resulting
hydrochloric acid solution?
Part B:
0.20 g of sodium hydroxide (NaOH) pellets are dissolved in water
to make 3.0 L of solution. What is the pH of this solution?

Manganese reacts with hydrochloric acid to produce manganese(II)
chloride and hydrogen gas.
Mn(s)+2HCl(aq) →
MnCl2(aq)+H2(g)
1. When 0.630 g Mn is combined with enough hydrochloric acid to
make 100.0 mL of solution in a coffee-cup calorimeter, all of the
Mn reacts, raising the temperature of the solution from 24.0 ∘C to
28.1 ∘C.
Find ΔHrxn for the reaction as written. (Assume that the
specific heat capacity of the solution is 4.18 J/g∘C and the
density is 1.00 g/mL.) (express answer...

Part A
0.75 g of hydrogen chloride (HCl) is dissolved in water to make
7.0 L of solution. What is the pH of the resulting
hydrochloric acid solution?
Express the pH numerically to two decimal places.
pH =
Part B
0.25 g of sodium hydroxide (NaOH) pellets are dissolved in water
to make 8.0 L of solution. What is the pH of this solution?
Express the pH numerically to two decimal places.
pH =

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