Answer:
Yes. Ca²⁺(aq) + SO₄²⁻(aq) ⟶ CaSO₄(s)
Step-by-step explanation:
The possible reaction is
CaI₂ + Na₂SO₄ ⟶ CaSO₄ + 2NaI
To predict a reaction, you must know <em>the solubility rules</em>.
The important ones for this question are
- Salts containing Na⁺ are <em>soluble</em>. Thus, NaI is soluble.
- Most sulfates are soluble, but CaSO₄ is not. Thus, CaSO₄ is a precipitate, and a reaction occurs.
Molecular equation
CaI₂(aq) + Na₂SO₄(aq) ⟶ CaSO₄(s) + 2NaI(aq)
Ionic equation
Ca²⁺(aq) + <u>2I⁻(aq)</u> + 2Na²⁺(aq) + SO₄²⁻(aq) ⟶ CaSO₄(s) + 2Na⁺(aq) + 2I⁻(aq)
Net ionic equation
Cancel all ions that appear on both sides of the reaction arrow (underlined).
Ca²⁺(aq) + <u>2I⁻(aq) </u>+ <u>2Na²⁺(aq)</u> + SO₄²⁻(aq) ⟶ CaSO₄(s) + <u>2Na⁺(aq)</u> + <u>2I⁻(aq)
</u>
The net ionic equation is
Ca²⁺(aq) + SO₄²⁻(aq) ⟶ CaSO₄(s)
To decrease the rate of the forward reaction you can do the following:
- decrease the concentration of the reactants
- increase the concentration of the products
- increase the pressure so the hydrogen gas will not be easily removed from the reaction
- decrease the temperature, number of collisions will decrease so the rate of the reaction will decrease
Answer:
40.73 L.
Explanation:
- We can use the general law of ideal gas: <em>PV = nRT.</em>
where, P is the pressure of the gas in atm (P = 121.59 kPa/101.325 = 1.2 atm).
V is the volume of the gas in L (V = ??? L).
n is the no. of moles of the gas in mol (n = 2.0 mol).
R is the general gas constant (R = 0.082 L.atm/mol.K),
T is the temperature of the gas in K (T = 25°C + 273 = 298 K).
<em>∴ V = nRT/P</em> = (2.0 mol)(0.082 L.atm/mol.K)(298 K)/(1.2 atm) = <em>40.73 L.</em>
Solution :
Compound Ksp
FeS
Ksp of and both compounds dissociate the same way. Hence is more soluble than
is less soluble than
It is not possible to determine CD - is more or less soluble than as though they have a different Ksp values their molecular dissociation is also different and they may have a close solubility values.
can be directly compared with PbS,
100
1-s s 2s
Ksp =
Hence they can be directly compared by Ksp values, smaller the Ksp, smaller the solubility.
For Silver Chloride
1 0 0
1 - s s s
Ksp
Hence, they can be directly compared by Ksp values, smaller the Ksp, smaller the solubility.
Answer:
2.5 mL
Explanation:
Generally cm^3 and ml are used interchangeably but ml is often used for liquids and cm^3 for solids
2.5 cm^3 = 2.5 cm^3