10/15/20

balance the equation
4. ____NaOH(aq) + ____FeCl3(aq) ------> ____Fe(OH)3(s) + ____NaCl(aq) 5. ____Mg(ClO3)2(s) --------> ____MgCl2(s) + ____O2(g) 6. ____Na(s) + ____O2(g) ---------->____Na2O(s) 7. ____Rb(s) +... more
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10/15/20

balance the equations
1. ____C3H8(g) + ____O2(g) --------> ____CO2(g) + ____H2O(g)2. ____Ca(s) + ____Ni(NO3)2(aq) --------> ____Ca(NO3)2(aq) + ____Ni(s)3. ____Ba(OH)2(aq) + ____HNO3(aq) ---------> ____H2O(l) +... more
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10/15/20

Standard solution, working out concentration
So I have made a standard solution ''stock'' solution of 13mg/ml. I dilute this solution using 0.1ml stock and 0.9 distilled water.Is my V1= 0.1ml C1=13mg/ml V2=1ml and therefore C2=1.3mg/ml?Thank... more
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10/15/20

what will the water do ? will if leave the cell
Osmosis & Diffusion Lab – Dialysis Tubing
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10/15/20

Suppose you wish to study the effect of temperature on the volume of a gas by heating a gas in a cylinder and measuring the resulting changes in volume.

What assumptions need to be made in order to study temperature and volume relationship?
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10/14/20

Write the formula of the conjugate acid of the Brønsted-Lowry base, (CH₃)₃N
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10/14/20

What is the pH of a 0.0460 M solution of HONH₃Cl (Kb of HONH₂ is 1.1 × 10⁻⁸)?
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10/14/20

Determine if the following salt is neutral, acidic or basic.

Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous... more
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10/14/20

The pOH of an acidic solution is 10.17. What is [OH⁻]?
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10/14/20

The pOH of a basic solution is 2.97. What is [H⁺]?
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10/14/20

In an aqueous solution at 25°C, if [H₃O⁺] = 8.8 × 10⁻⁴ M, then [OH⁻] is:
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10/14/20

What is the percent ionization?
What is the percent ionization in a 0.460 M solution of formic acid (HCOOH) (Ka = 1.78 × 10⁻⁴)?
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10/14/20

Determine if the following salt is neutral, acidic or basic.

Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous... more
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10/14/20

Determine whether the forward or reverse reaction is favored
Review the reversible reactions given, along with the associated equilibrium constant K at room temperature. In each case, determine whether the forward or reverse reaction is favored.1) CH3COOH ↔... more
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10/14/20

Identify the correct equation for the equilibrium constant Ka for the weak acid dissociation of acetic acid.
Identify the correct equation for the equilibrium constant Ka for the weak acid dissociation of acetic acid.HC2H3O2(aq)+H2O(l)−⇀↽−H3O+(aq)+C2H3O2−(aq)
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10/14/20

What is the value of the equilibrium constant, Kc, for the dissolution of  PbCl2?
Consider the reversible dissolution of lead(II) chloride.PbCl2(s)−⇀↽−Pb2+(aq)+2Cl−(aq)Suppose you add 0.2252g of PbCl2(s) to 50.0mL water. When the solution reaches equilibrium, you find that... more
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10/14/20

What is the molarity of the acetic acid?
Using the procedure in Determination of an Equilibrium Constant, a student combines equimolar amounts of acetic acid and ethanol to react as shown by the following equation.acetic... more
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10/14/20

What is the equilibrium concentration (M) of ethyl acetate?
Consider the balanced reversible reaction of acetic acid with ethanol.acetic acid + ethanol ⇌ ethyl acetate + waterWhen you react 8.44M acetic acid with 8.44M  ethanol, the equilibrium... more
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10/14/20

Standard solution, serial dilution
Can someone please explain this for me?I have made a standard solution using 325mg of solute and dissolving it in water to make it up to 25ml. the conc = 13mg/mlThen I need to transfer 1ml of my... more
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10/14/20

Standard solution, working out concentration
Hi,So In a practical I used 325mg of a solvent and I dissolved this in water to make it up to 25ml.Now I have to work out the exact concentration of my ''stock'' solution in mg/l is it 0.013... more
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10/14/20

Chemistry Titration Problem
A student titrates a 20.13 mL sample of HCl of unknown concentration. She begins her titration at the 0.00 mL mark and ends the titration at the 33.98 mL mark. The NaOH solution has a molarity of... more
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10/14/20

Calculating heat of reaction from bomb calorimetry data?
A student runs two experiments with a constant-volume "bomb" calorimeter containing 1500.g of water.First, a 7.000g tablet of benzoic acid (C6H5CO2H) is put into the "bomb" and burned completely in... more
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10/14/20

Does a reaction occur when aqueous solutions of iron(II) chloride and barium hydroxide are combined?
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10/14/20

If the heat of combustion for a specific compound is - 1170.0kJ / mol and its molar mass is 96.79g / mol, how many grams of this compound must you burn to release 485.50 kJ of heat?
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10/14/20

mixture? reactions?
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant... more
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