04/06/24

What is the concentration of lithium ions in 0.460 M Li₂HPO₄?
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04/05/24

See below Nutrient concentration

How many ounces of triple superphosphate are required per 100 gallons of pure water to arrive at a concentration of one part per million ( ppm ) ? For 48% P205
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04/05/24

Write a balanced chemical equation for the equilibrium reaction occurring in a buffer containing NH3 and NH4Cl. Write the equation so that its equilibrium constant is equivalent to Ka.
Write a balanced chemical equation for the equilibrium reaction occurring in a buffer containing NH3 and NH4Cl. Write the equation so that its equilibrium constant is equivalent to Ka.
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04/05/24

What is the pH at the equivalence point when 95.0 mL of a 0.175 M solution of acetic acid (CH3COOH) is titrated with 0.100 M NaOH to its end point?
What is the pH at the equivalence point when 95.0 mL of a 0.175 M  solution of acetic acid (CH3COOH) is titrated with 0.100 M  NaOH to its end point?
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04/05/24

25.0 mL of 0.275 M HNO2 is titrated to its equivalence point with 1.00 M NaOH. What is the pH at the equivalence point?
25.0 mL of 0.275 M  HNO2 is titrated to its equivalence point with 1.00 M  NaOH. What is the pH at the equivalence point?
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04/05/24

How many moles of HNO2 and NaNO2 remain in solution after addition of the HCl?
1.00 mL of 12.0 M HCl is added to 1.00 L of a buffer that contains  0.130 M HNO2 and 0.200 M NaNO2. How many moles of HNO2 and NaNO2 remain in solution after addition of the HCl?___ mol HNO2... more
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04/05/24

Calculate the pH at 25°C of 199.0 mL of a buffer solution that is 0.210 M NH4Cl and 0.210 M NH3 before and after the addition of 1.80 mL of 6.0 M HNO3. (The pKa for NH4+ = 9.75)
Calculate the pH at 25°C of 199.0 mL of a buffer solution that is 0.210 M  NH4Cl and 0.210 M  NH3 before and after the addition of 1.80 mL of 6.0 M  HNO3. (The pKa for NH4+ = 9.75)pH before = pH... more
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04/05/24

What is the pH of a solution that results from mixing together equal volumes of a 0.060 M solution of ammonia and a 0.030 M solution of hydrochloric acid? (pKa of NH4+ = 9.25)
What is the pH of a solution that results from mixing together equal volumes of a 0.060 M  solution of ammonia and a 0.030 M  solution of hydrochloric acid? (pKa of NH4+ = 9.25)
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04/05/24

gas law tutorial boyle
alculate the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L
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04/05/24

How many moles of NaOH are needed to neutralize 1.80 grams of KHP
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04/04/24

How many grams of potassium chloride (MW K = 39, MW Cl = 35.5) are needed to make 125 mL of a solution containing 200 mOsmol/L? Do not include units. Round to the nearest hundredth.
How many grams of potassium chloride (MW K = 39, MW Cl = 35.5) are needed to make 125 mL of a solution containing 200 mOsmol/L? Do not include units. Round to the nearest hundredth.
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04/04/24

Drawing a box diagram of the electron configuration of an atom
Drawing a box diagram of the electron configuration of an atom: Draw the electron configuration for a neutral atom of cobalt.
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04/04/24

A liter of an electrolyte solution contains the following: 131 mEq Na+, 111 mEq Cl-, 5 mEq K+, 29 mEq C3H5O3- (lactate), and 4 mEq Ca2+. How do you convert each of these values to mmol/L?
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04/04/24

Sterile solutions of potassium chloride containing 5 mEq/mL are available in 20 mL containers. How do you calculate the amount, in grams, of potassium chloride in the container.
Rationale, and what is being asked.
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04/04/24

A sterile solution of potassium chloride contains 2 mEq/mL. If a 20-mL vial of the solution is diluted to 1 liter, what is the percentage strength of the resulting solution?
Rationale, and tips for what to look for in a problem like this.
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04/04/24

How do you convert blood plasma range of 11 to 25 mcmol/L of copper (MW=63.55) to mcg/mL?
Tips for knowing what a question like this is asking for.
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04/04/24

How do you calculate the following to determine if they are hypotonic, isotonic, or hypertonic?
a. An ophthalmic solution containing 40 mg/mL of cromolyn sodium and 0.01% of benzalkonium chloride in purified waterb. A parenteral infusion containing 20 % (w/v) of mannitolc. A 500-mL... more
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04/04/24

need help with a pH question
In a beaker, there is 40 mL of 0.1 M weak acid, HA (Ka=2.5 x 10-8). Calculate the pH of this acid then calculate the pH after 25 mL of 0.1 M NaOH has been added.
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04/04/24

Which salts will be more soluble in an acidic solution than in pure water? (in description)

1.) BaSO4 2.) CsClO4 3.) AgI 4.) Zn(OH)2 5.) CaCO3
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04/04/24

Calculate the pH of the titration mixture after 20.0 mL of base have been added.

A 25.0 mL sample of a  0.100 M  solution of acetic acid is titrated with a  0.125 M  solution of NaOH. Calculate the pH of the titration mixture after 20.0 mL of base have been added. The Ka for... more
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04/03/24

What quantity of heat (in kJ) is absorbed in the process of making 0.771 mol of CF₄ from the following reaction? C (s) + 2 F₂ (g) → CF₄ (g) ∆H° = 141.3 kJ/mol
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04/03/24

Find the theoretical and per cent yeilds
Magnesium is the limiting reactant in this experiment. Calculate the theoretical yield of MgO for each trial.  Trial 1: Trial 2: Determine the per cent yield of MgO for your experiment for each... more
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04/03/24

If 3.4 mol C2H4O are used, determine the number of moles of O2 that would be used
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04/03/24

Gen Chem 2: coulombs
8. How many Coulombs of charge are needed to reduce FeSO4 to yield 28.5g of Fe metal?A) 157 CB) 2.91 x 105 CC) 2.46 x 104 CD) 2.75 x 103 CE) 3.62 x 104 CF) 72.7 CG) 5.01 x 104 CH) 9.85 x 104 C
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04/02/24

How to solve this delta G problem (gen chem 2)
2. Consider the following reaction, for which data at 25oC are given: 2Na+(aq) + CO32-(aq) → Na2CO3(s)∆Hof (kJ/mol) -240.1 -677.1 -1130.8So (J/K mol)... more
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