Answer:
The minimum concentration of sodium sulfate required to producer precipitation is .
Explanation:
Concentration of barium chloride=
Concentration of barium ions =
1 mol of barium chloride gives 1 mol of barium ions.
The solubility product for barium sulfate=
0.019 M S
The expression of solubility product for barium sulfate:
The minimum concentration of sulfate ions =
1 mole of sulfate ions are proceed form 1 mole of sodium sulfate solution.
Then sulfate ions will be obtained from:
of sodium sulfate
The minimum concentration of sodium sulfate required to producer precipitation is .
The answer is C because it's the only that pertains to climate change. The other answers are more about local economy.
Answer:
Explanation:
Given: Entropy of surrounding: ΔSsurr = ?
Temperature: T= 355 K
The change in enthalpy of reaction: ΔH = -114 kJ
Pressure: P = constant
As we know, ΔH = -114 kJ ⇒ negative
Therefore, the given reaction is an exothermic reaction
Therefore, Entropy of surrounding at <em>constant pressure</em> is given by,
<u><em>In the given reaction:</em></u>
2NO(g) + O₂(g) → 2NO₂(g)
As, the number of moles of gaseous products is less than the number of moles of gaseous reactants.
As we know, <em>for a spontaneous process, that the total entropy should be positive.</em>
<u>Therefore, at the given temperature,</u>
- if then the given reaction is spontaneous
- if then the given reaction is non-spontaneous
Explanation:
As the total concentration is given as 1.2 mM. And, it is also given that salt present in the solution is NaCl.
As sodium chloride is an ionic compound so, when it is added to water then it will dissociate into sodium and chlorine ions as follows.
So, it means in total there will be formation of 2 ions when one molecules of NaCl dissociates.
Therefore, concentration of chlorine ions will be calculated as follows.
Concentration of ions =
= 0.6 mM
Thus, we can conclude that the concentration of chloride ions is 0.6 mM.
When universal indicator is added to a solution, the color change can indicate the approximate pH of the solution. Acids cause universal indicator solution to change from green toward red .