Chemistry, 16.07.2019 04:00 IntellTanito

What is the concentration of no3- ions in a solution prepared by dissolving 15.0 g of ca(no3)2 in enough water to produce 300. ml of solution?

Answers: 1

Show answers

Answers

Answer from: MrKrinkle77

The concentration of NO₃¯ in the solution is 0.61 M

We'll begin by calculating the number of mole in 15 g of Ca(NO₃)₂. This can be obtained as follow:

Mass of Ca(NO₃)₂ = 15 g

Molar mass of Ca(NO₃)₂ = 40 + 2[14 + (16×3)]

= 40 + 2[14 + 48]

= 40 + 2[62]

= 40 + 124

= 164 g/mol

Mole of Ca(NO₃)₂ =?

Mole = mass / molar mass

Mole of Ca(NO₃)₂ = 15 / 164

Mole of Ca(NO₃)₂ = 0.0915 mole

Next, we shall determine the molarity of Ca(NO₃)₂. This can be obtained as follow:

Mole of Ca(NO₃)₂ = 0.0915 mole

Volume = 300 mL = 300 / 1000 = 0.3 L

Molarity of Ca(NO₃)₂ =?

Molarity = mole / Volume

Molarity of Ca(NO₃)₂ = 0.0915 / 0.3

Molarity of Ca(NO₃)₂ = 0.305 M

Finally, we shall determine the concentration of NO₃¯ in the 0.305 M Ca(NO₃)₂ solution. This can be obtained as follow:

Ca(NO₃)₂(aq) —> Ca²⁺ (aq) + 2NO₃¯ (aq)

From the balanced equation above,

1 mole of Ca(NO₃)₂ produced 2 moles of NO₃¯.

Therefore,

0.305 M Ca(NO₃)₂ will produce = 2 × 0.305 = 0.61 M NO₃¯

Thus, the concentration of NO₃¯ in the solution is 0.61 M

Learn more: link

Answer from: emmaguentherp3hjd3

Ca(NO3)2 > Ca²⁺ +2NO3⁻

M(Ca(NO3)2)= M(Ca) + M(N) + 6M(O)= 40.0 +14.0 +6*16.0 = 150 g/mol

15.0 g Ca(NO3)2 * 1mol/150 g = 0. 100 mol Ca(NO3)2

Ca(NO3)2 > Ca²⁺ +2NO3⁻
1 mol 2 mol
0.100 mol 0.200 mol

We have 0.2 mol NO3⁻ in 300. mL=0.300 L of solution,
so
0.200 mol NO3⁻ / 0.300 L solution ≈ 0.667 mol NO3⁻ /L solution = 0.667 M

Concentration of NO3⁻ is 0.667 M.

Answer from: Quest

- decrease the number of plants and animals living in the water.

Answer from: Quest

fr8t7iot7o87oglgt87ot79p0[90

Another question on Chemistry

Chemistry, 21.06.2019 19:30

What are the percent by mass of copper in penny lab

Answers: 3

Answer

Chemistry, 22.06.2019 16:40

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates

Answers: 3

Answer

Chemistry, 22.06.2019 19:30

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?

Answers: 2

Answer

Chemistry, 22.06.2019 22:00

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope

Answers: 1

Answer

You know the right answer?

What is the concentration of no3- ions in a solution prepared by dissolving 15.0 g of ca(no3)2 in en...

Questions