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storchak [24]
3 years ago
8

What is the molarity of a 0.40 L Solution with 6.2 g KCl?

Chemistry
1 answer:
Kitty [74]3 years ago
8 0

Answer:

Molarity of KCl = 0.03M

Explanation:

Molarity=\frac{W}{GMW} \times \frac{1000}{V(in\,ml)}

Given

Weight of $KCl$ =6.2g

V=0.40 L=400ml

Gram Molecular weight=74.55g

Therefore Molarity = \frac{6.2}{74.55}\times{1000}{400}\\                                =0.03M

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A 0.753 g sample of a monoprotic acid is dissolved in water and titrated with 0.250 M NaOH. What is the molar mass of the acid i
Alexeev081 [22]

Answer:

MM_{acid}=140.1g/mol

Explanation:

Hello,

In this case, since the acid is monoprotic, we can notice a 1:1 molar ratio between, therefore, for the titration at the equivalence point, we have:

n_{acid}=n_{base} \\\\V_{acid}M_{acid}=V_{base}M_{base}\\\\n_{acid}=V_{base}M_{base}

Thus, solving for the moles of the acid, we obtain:

n_{acid}=0.0215L*0.250\frac{mol}{L}=5.375x10^{-3}mol

Then, by using the mass of the acid, we compute its molar mass:

MM_{acid}=\frac{0.753g}{5.375x10^{-5}mol} \\\\MM_{acid}=140.1g/mol

Regards.

7 0
3 years ago
Distinguish between mass and weight
yKpoI14uk [10]

Answer:

There is a basic difference, because mass is the actual amount of material contained in a body and is measured in kg, gm, etc. Whereas weight is the force exerted by the gravity on that object mg. Note that mass is independent of everything but weight is different on the earth, moon, etc.

3 0
3 years ago
Read 2 more answers
Convert 35 kg to its equivalent in g. Hint 1000g = 1kg
borishaifa [10]

Answer:

35,000 g

Explanation:

1000g=1 kg

1000*35=35,000

3 0
3 years ago
Write a net ionic equation for the reaction that occurs when excess hydroiodic acid and chromium(II) carbonate (s) are combined.
LUCKY_DIMON [66]

Answer:

Net ionic equation: 2I⁻(aq) + Cr²⁺(aq) → CrI₂(s)

<h3>Explanation:</h3>
  • A chemical equation shows chemical symbols of compounds known as reactants and compounds known as products in a chemical reaction.
  • The chemical equation between hydroiodic acid and chromium (II) carbonate is given by;

2HI(aq) + CrCO₃(aq) → H₂CO₃(aq) + CrI₂(s)

  • The Ionic equation is an equation that shows all the ions involved in a chemical reaction.
  • In this case, the ionic equation is;

2H⁺ I⁻(aq)+ Cr²⁺ CO₃²⁻(aq) → 2H⁺ CO₃²⁻(aq) + CrI₂(s)

  • The net ionic equation is an equation showing only the ions that take part in the reactions. The ions that do not take part in the chemical reaction known as spectator ions are not shown when writing net ionic equations.
  • Spectator ions are those ions that do not change state after the chemical reaction has taken place. In this case, hydrogen ions and carbonate ions are spectator ions.
  • The net ionic equation is

2I⁻(aq) + Cr²⁺(aq) → CrI₂(s)

6 0
3 years ago
Suppose that 26.89 ml of vinegar solution requires 33.23 ml of the 0.09892 m sodium hydroxide solution to reach the endpoint. ca
nata0808 [166]
Number of millimoles of NaOH consumed in present titration =<span>33.23 X 0.09892
                                                                                                 = 3.287

Thus, number of millimoles of vinegar present in sample = 3.287

Now, Molarity of vinegar solution = </span>\frac{\text{number of millimoles of vinegar}}{\text{volume of solution (ml)}}
<span>                                                     = </span>\frac{3.287}{26.89}
<span>                                                     = 0.1222 mol/dm3

Molar concentration of vinegar present in sample solution is 0.1222 M </span>
5 0
3 years ago
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