calcium and strontium are close to one another on thw oeriodic table. what do you know about their ionization energies ,their el
ectron configurations and their charasteristics based on their position in the periodic table?
1 answer:
Both Ca and Sr are in Group 2 of the Periodic Table, with Sr below Ca (see image)..
<em>Ionization energies </em>
They are both metals, so they have relatively <em>low ionization energies</em>.
Sr is below Ca in the Group, so Sr has the lower ionization energy.
<em>Electron configurations </em>
Their electron configurations both end in <em>ns²</em>.
For example, the electron configuration of Ca is [Kr]<em>4s²</em> and that of Sr is [Kr]<em>5s²</em>.
<em>Physical chsrscteristics: </em>
- metallic lustre
- malleable
- ductile
- good conductors of heat and electricity
<em>Chemical characteristics</em>
Both metals react with
• <em>Hydrogen</em> to form hydrides: M + H₂ ⟶ MH₂
• <em>Oxygen</em> to form oxides: 2M + O₂ ⟶ 2MO
• <em>Nitrogen</em> to form nitrides: 3M + N₂ ⟶ M₃N₂
• <em>Halogens</em> to form halides: M + X₂ ⟶ MX₂
• <em>Water</em> to displace hydrogen: M + 2H₂O ⟶ M(OH)₂ + H₂
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The question is incomplete, here is the complete question:
At 25°C Henry's Law constant for carbon dioxide gas in water is 0.031 M/atm . Calculate the mass in grams of gas that can be dissolved in 425. mL of water at 25°C and at a partial pressure of 2.92 atm. Round your answer to 2 significant digits.
<u>Answer:</u> The mass of carbon dioxide that can be dissolved is 1.7 grams
<u>Explanation:</u>
To calculate the molar solubility, we use the equation given by Henry's law, which is:
where,
= Henry's constant =
= molar solubility of carbon dioxide gas
= partial pressure of carbon dioxide gas = 2.92 atm
Putting values in above equation, we get:
To calculate the mass of solute, we use the equation used to calculate the molarity of solution:
Given mass of carbon dioxide = ? g
Molar mass of carbon dioxide = 44 g/mol
Molarity of solution =
Volume of solution = 425 mL
Putting values in above equation, we get:
Hence, the mass of carbon dioxide that can be dissolved is 1.7 grams