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BigorU [14]
4 years ago
11

Complete the following precipitation reaction with balanced molecular, total ionic, and net ionic equations. Remember to include

the proper physical states and charges of ions. When writing ions, if a charge number is not "1", place the charge number before the charge sign. If a charge number is "1", do not include the charge number in the formula. Na2S(aq) + ZnSO4(aq) →
Chemistry
1 answer:
LekaFEV [45]4 years ago
4 0

<u>Molecular equation (includes all species in the molecular form)</u>

Na₂S(aq) + ZnSO₄(aq) → Na₂SO₄(aq) + ZnS(s)

<u>Total ionic equation (includes all ions. Insoluble solids do not dissociate)</u>

2 Na⁺(aq) + S²⁻(aq) + Zn²⁺(aq) + SO₄²⁻(aq) → 2 Na⁺(aq) + SO₄²⁻(aq) + ZnS(s)

<u>Net ionic equation (includes only ions that participate in the reaction, that is, it does not include spectator ions)</u>

S²⁻(aq) + Zn²⁺(aq) → ZnS(s)

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What is the molality of a solution prepared by dissolving 75.8 g of ethylene glycol, HOCH2CH2OH, in 1.55 L of water? Assume the
GaryK [48]

Answer:

                     0.787 mol.Kg⁻¹   or    0.787 m

Explanation:

Data Given:

                  Mass =  m  =  75.8 g

                  Volume  =  V  =  1.55 L = 1550 mL

                  M.Mass of Ethylene Glycol  =  62.07 g/mol

                  Density of water  =  d = 1.0 g/mL

To Find:

                   Molality  =  <u>??</u>

Molality is a unit of concentration and is defined as the number of moles of solute per Kg of a solvent.

                    Molality  =  Moles of Solute / Kg of Solvent  --- (1)

First Calculate Moles of Solute as;

                    Moles  =  Mass / M.Mass

                    Moles  =  75.8 g / 62.07 g/mol

                    Moles  = 1.22 moles

Secondly calculate mass of water as,

                    mass of water  =  density × volume

                    mass of water  =  1.0 g/mL × 1550 mL

                    mass of water  =  1550 g or 1.55 Kg

Now, putting values of moles and mass of solvent in equation 1,

                    Molality  =  1.22 mol / 1.55 Kg

                    Molality  =  0.787 mol.Kg⁻¹   or    0.787 m

7 0
3 years ago
M&amp;M balance equations
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Answer:

Explanation:

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Explanation:

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For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equals to rate of the backward reaction which means the products are being made as quickly as reactants

Equilibrium state is the state when reactants and products are present but the concentrations does not change with time.

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<em>H</em><em>e</em><em>r</em><em>e</em><em> </em><em>,</em>

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3 0
3 years ago
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pickupchik [31]

Answer:

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Explanation:

Remember that the pH is calculated as

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With a concentration 1e-5, it yields a pH of 5.00 and with 1e-2 a value of 2.00

6 0
4 years ago
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