Answer:
Explanation:
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In this case, since the net ionic equation of a chemical reaction shows up the ionic species that result from the simplification of the spectator ions, which are those at both reactants and products sides, we take into account that aqueous species ionize into ions whereas liquid, solid and gas species remain unionized. In such a way, for the reaction of cesium phosphate and silver nitrate we can write the complete molecular equation:
Whereas the three aqueous salts are ionized in order to write the following complete ionic equation:
In such a way, since the cesium and nitrate ions are the spectator ions because of the aforementioned, the net ionic equation turns out:
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Answer:
1.42 M
Explanation:
First calculate the amount of moles.
that's done by dividing the mass with the molecular mass so 660g / 310.18 g/mol = 2.13 mol
Then you can calculate the molarity by dividing the moles with the volume so 2.13 mol / 1.5 l = 1.42 M
(without rounding: 1.418531175 M)
Answer:
Mass = 24.4 g
Explanation:
Given data:
Mass of lithium nitride needed = ?
Volume of ammonia = 15.0 L
Solution:
Chemical equation:
Li₃N + 3H₂O → NH₃ + 3LiOH
One mole = 22.414 L
We will compare the volume of lithium nitride and ammonia.
NH₃ : Li₃N
22.414 : 22.414
15.0 : 15.0
Number of moles of lithium nitride:
PV = nRT
n = 1 atm ×15 L / 0.0821 atm.L / mol.K × 273 K
n = 15 /22.41 /mol
n =0.7
Mass of Lithium nitride:
Mass = number of moles × molar mass
Mass = 0.7 mol × 34.83 g/mol
Mass = 24.4 g
Answer:
Lemon juice has lowest pH.
Explanation:
pH is the negative log of hydrogen ion concentration. By increasing the Hydrogen ion concentration pH will decrease.
pH = -log [H⁺]
According to pH scale,
The pH of 7 is consider neutral. The pH below the 7 is consider acidic and above the 7 is basic.
The sodium hydroxide is strongest base because it fully dissociate into ions.
It dissociate to gives the sodium and hydroxyl ions and solution became more basic.
NaOH → Na⁺(aq) + OH⁻(aq)
Its pH is 12. It is also known as caustic soda.
The pH of blood is vary from 7.35 - 7.45. it is slightly alkaline.
The pH of lemon juice is ranging between 2-3.
The pH of tap water is ranging between 6-8.5.
From above given information it can be noticed that lemon juice have lowest pH i.e 2-3. It is acidic, because its pH is less than 7.
Answer:
Concentration of sodium nitrate solution is 0.636 mmol/L
Explanation:
We know, 
So, 
Concentration in mmol/L is defined as number of mmol of solute dissolved in 1000 mL of solution
Here solute is 
Total volume of solution = Total volume of volumetric flask = 450. mL
Hence concentration of solution = 
So, concentration of sodium nitrate solution is 0.636 mmol/L
