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What is the final pH of the solution when 15.0 mL of 0.121 mol/L NaOH(aq) and 35.0 mL of 0.181 mol/L HNO2(aq) are mixed? Assume the temperature is 25oC.
What is the pH of a 0.175 mol/L solution of sodium acetate, CH3COONa, at 25oC? (pKa=4.74 at 25oC for CH3COOH.) Give your answer accurate to two decimal places
The solubility of magnesium fluoride, MgF2, in water is 0.016 g/L. What is the solubility (in grams per liter) of magnesium fluoride in 0.013 M sodium fluoride, NaF
List 2 major factors that will affect the accuracy of your data and how you can improve the experiment
Calculate the [OH-] in 0.050 M potassium fluoride, KF The answer choices are: A. 8.3 × 10-7 M B. 4.7 × 10-7 M C. 6.2 × 10-7 M D. 1.4 × 10-6 M E. 2.2 × 10-6 M
Calculate the pH of 0.050 M Fe(NO3)3 solution. The hydrated Fe3+ ion is [Fe(OH2)6]3+. For [Fe(OH2)6]3+, Ka = 4.0 × 10-3
Read carefully, 0.1M HCl is added into a mixture of 25mL of water and 25mL of Ca(OH)2. For the end point to be reached 1.3mL of 0.1M HCl is added into the mixture. How would I calculate the molarity
Salicyclic acid forms a polymeric byproduct as a result of this reaction. It is a small percentage of the final product mixture, but it can be visualized via TLC (the small spot just above the aspir
Classify which reaction is single replacement, double replacement, decomposition, combination and combustion. SiO2+HF--->sIf+H2O C7H10N+O2--->CO2+H2O+NO2 KO2+CO2--->K2CO3+O2 C4H10+Cl2+O2--
Calculate the molarity of the hydroxide ion (OH-) for this final mixture (51.5mL) Please do not tell me to do Y while leaving out X and Z
Why would a mixture of salts be more difficult to identify than a single salt? For example, copper sulfate, barium nitrate and nickel bromide versus only nickel bromide.
Use the Boltzmann equation to calculate the excited-state and ground-state population ratio for HCl (g*/g0=1) at room temperature (25 oC). The frequency of the absorption from the ground to the exci
A white colored salt contains a cation from group 4. It has no reaction with concentrated H2SO4 or AgNO3. It produces an insoluble product with acidic BaCL2. This salt is not water soluble. What is
A water soluble salt forms a precipitant during the group 3 analysis. An acidic solution of this precipitant and NaBIO3 yields a pinkish color. This same salt has no reaction to BaCL2
The addition of thioacetamide to an acidic solution of this compound results in the precipitation of a solid that forms a deep blue solution when added to aqueous NH3. Identify the chemical formula
How many stereogenic centers are there in 1,1,2,3-tetramethylcyclohexane? a) 1 b) 2 c) 3 d) 4
Which of the following groups would have the highest priority in determining R and S. a) CH2CH2OH b) CH(CH3)2 c) CH2CH3 d) CH2C(CH3)3
The absolute configurations for cis-1,2-dimethylcyclopropane would be a) (R,R) b) (S,S) c) either (R,R) or (S,S) d) (R,S)
If the optical rotation of pure (R)-2-butanol is -13.5°, then you would expect the optical rotation of racemic 2-butanol to be a) -13.5° b) +13.5° c) 0° d) can't tell
Which of the following could have a meso stereoisomer. a) 1,2-dichloropentane b) 1,3-dichloropentane c) 2,2-dichloropentane d) 2,4-dichloropentane
Suppose the reaction is at equilibrium 2NOBr (g)<---->2NO(g)+Br2(g) Delta Hf NOBr=82.2 Kj/mol DeltaHf NO=90.4 KJ/mol What happens to Kp when the temperature is increased
The frequency of the absorption from the ground to the excited state is 2885 cm-1. What is the population ratio when temperature goes up to 50 oC
when 15.12 ml of 0.1194 M NaOH is added to 25 ml of 0.1264 M HX(an unnknown weak acid),the resulting pH is 5.9 . what is the ka of the unknown acid
The concentration of SO4 is .5 M in a certain solution of Al2(SO4)3. what is the molar concentration of Al in the solution
Calculate how many gallons of the strong vinegar would need to be added to the 10,000 gallons of the weak vinegar to obtain a solution that is the appropriate 5.10% acetic acid by mass.