A weak acid has a Ka of 2.5×10^-5.  What is the Kb of its conjugate base?  Which is stronger, the acid or the conjugate base?

Q: Two dm' of N2 at 0°C and 500 kPa pressure are expanded isothermally against a constant pressure of 1...

A: An isothermal process is the one in which temperature is kept constant.  First law of thermodynamics...

Q: Only one of the following changes will shift the equilibrium of this reaction left, favoring reactan...

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Q: net chemical equation

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Q: The activation energy for a certain first-order reaction is 139 kJ/mol. if the rate constant is 0.2...

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Q: Does the addition of HCl to the samples being titrated affect the solubility of calcium hydroxide? W...

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Q: Name types of gels (sieving matrix) that may be used for gel filtration chromatography and discuss t...

A: The types of gels for gel filtration chromatography include, Dextran Polyacrylamide beads/ agarose ...

Q: Which of the following is the most basic solution (highest [UH ])? O pH 12 %3D O pOH = 1.0 o [OH] = ...

A: 1) pH=12 we know, pH + pOH = 14 pOH = 14 - 12 = 2

Q: Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for denta...

A: GIVEN:-

Q: Determine the specific heat capacity of 250.0g of an unknown metal. When the metal absorbs 18.1 kJ o...

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Q: O The conjugate base of a strong acid will significantly raise the pH of water O For a polyprotic ac...

A: The correct statement is :

Q: d. dry HCI HOCH,CH,OH

A: Carbonyl compound (aldehyde and ketone) reacts with an alcohol to form hemiacetal in the presence of...

Q: Although there are more electrons available to create bonds in F2 than in 02, the bond dissociation ...

A: In O2 according to MO theory highest occupied orbital is π*2px= π*2py anti bonding orbitals. 6 elect...

Q: The presence of a catalyst the enthalpy (AH) difference between products and reactants. (A) (B) Decr...

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Q: What is the molecular formula of the molecule with molecular mass of 120.12g/mol. and an empirical f...

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Q: Write the cell notation for an electrochemical cell consisting of an anode where Zn (s) is oxidized ...

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Q: Calculate the mass of glucose (C,H,20,) that contains a billion (1.00 x 10') hydrogen atoms. Be sure...

A: No. of H atoms = 1.00×109 atoms mass of glucose = ? molar mass of glucose = 180 g mol-1 #of H in glu...

Q: Phosphorus trichloride and chlorine gas react to form phosphorus pentachloride: PCh (g) + Cl, (R) O ...

A: Using ICE table   PCl3 Cl2 PCl5 Initial 1.0 M 2.0 M 0 Change x x x Equilibrium 1.0 -x 2...

Q: What is the calculated value of the cell potential at 298K for an electrochemical cell with the foll...

A: Given data : PF2 = 1.20 atm [F-] = 7.48 × 10-3 M [Ni2+] = 8.36×10-4 M  

Q: What is the pH of a solution containing 0.57 mol L-1 of a diprotic acid with pKA1 = 5.36 and pKA2 = ...

A: Answer: 2.80

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 799.0 mg sample...

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Q: Give the oxidation number and coordination of the central metal of the following compounds: a. [Ni(N...

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Q: here are 7.62 x 1015 metric tons (T) of nitrogen in the atmosphere (1 metric ton = 1000kg). How...

A: Solution - According to the question - 1 metric ton = 1000kg 1 kg = 2.20 lb 1 metric tons = 1000 * 2...

Q: A practitioner will make a titration curve. The practitioner pipetted 10 mL of 0.1 M HCl solution an...

A: "Since you have asked multiple questions, we will solve the first question for you i.e  (HCl vs NaOH...

Q: Calculate ∆H for the reaction 4NH3 (g) + 5O2 (g) → 4NO (g) + 6H2O (g), from the following data. 1. N...

A: 4NH3 (g) + 5O2 (g) → 4NO (g) + 6H2O (g) 1. N2 (g) + O2 (g) → 2NO (g) , ∆H = -180.5 kJ 2. N2 (g) + 3H...

Q: The following reaction is first order in N2O5N2O5: N2O5(g)→NO3(g)+NO2(g)N2O5(g)→NO3(g)+NO2(g) The ...

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Q: Directions: Balance the chemical equation below and complete its mole ratio on the table below. C3H8...

A: Balanced equation: It can be defined as the chemical equation where the number of each atom is the s...

Q: m Calculate the kinetic energy of a 34. g bullet moving at a speed of 458. Round your answer to 2 si...

A: Given, mass of a bullet = 34. g = 0.034 kg Speed, v = 458. m.s-1

Q: Aqueous sulfuric acid (H,SO,) reacts with solid sodium hydroxlide (NaOH) to produce aqueous sodium s...

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Q: Gaseous methane (CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (Co.) an...

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Q: 1.0 x 10 11 moles of HCl are added to 1.0 L of H2O. What is the pH? O 10.0 O 11.0 3.0 o 7.0

A: Moles of HCl = 1.0 × 10^-11 mole Volume of H2O = 1.0 L  

Q: A 75.0 mL sample of 0.05 M HCN (pKa = 9.21) is titrated with 0.5 M NAOH. What is [H3O*] in the solut...

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Q: This is the chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive MTBE): CH...

A: The chemical formula for methyl tert-butyl ether :-  CH3OC(CH3)3  Moles of C in methyl tert-butyl et...

Q: determine the reducible representation. show your work. What does the reducible representation reduc...

A: In the given problem the reducible representation of the given molecule are needed to be derived. 

Q: Determine the heat associated with a decrease in the temperature of 375g of water from 31.5°C to 24....

A: Heat associated with decreasing temperature is calculated using the equation,                       ...

Q: The highest building in Montreal is the ‘1 square building’, with a height of 203m. The atmospheric ...

A: Given: Temperature = 298 K Collision cross section (σ)= 0.43 nm2 Pressure =9.9 x 104 Pa. To Calculat...

Q: Gaseous ethane (CH;CH,) reacts with gaseous oxygen gas (02) to produce gaseous carbon dioxide (CO,) ...

A: Given that, mass of ethane= 13.2 g, molar mass=30 g mol-1 mass of oxygen=45.8 g, molar mass= 32 g mo...

Q: Which of the following describes the final major product of the reaction of 2-propanone with excess ...

A: Carbonyl compound (aldehyde and ketone) reacts with an alcohol to form hemiacetal in the presence of...

Q: 10) Calculate the moles of magnesium ( Show your calculation

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as...

Q: A chemist measures the amount of bromine liquid produced during an experiment. She finds that 309. g...

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Q: Write a balanced half reaction for the following: SO42-  → SO32-

A: balanced half reaction for the  SO42-  → SO32-  is given below

Q: What is the rate law for the given reaction? rate KS208) rate = KS2081 rate = kS2081?

A: Chemical kinetics can be defined as the branch of chemistry that deals with rates of chemical reacti...

Q: 3. Calculate the kg/cmol for Ca*2 (review the calculations from Lab 1). If a soil can retain 25 cmol...

A: Answer and explanation is given below hope you like it.

Q: LOCH3 CH;OH (+ CH3OH2 + 1°) LOCH3 CH;OH (+ CH3ОН2 +19)

A: The SN1 and SN2 are the nucleophilic substitution reactions where SN1 is unimolecular nucleophilic s...

Q: This question is based on the five compounds (A-E) given below. (A) CH;-CH=CH-CH3 (B) (C) CHCI=CHBR ...

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Q: 2Al(s) + 3I2(s) > 2AlI3 If 7.5 moles of AlI3 is consumed, then how many moles of I2 is needed? *Use ...

A: Aluminum reacts with iodine to form aluminum iodide. The equation for the balanced chemical reaction...

Q: What role did enthalpy play in the melting process of the crayons? 2. How did the melting process de...

A: 1. Answer - According to the question - Below the melting point, the changes in enthalpy and entropy...

Q: is solution is prepared by mixing 25 mL of 0.1 M HCHO2 with 25 mL of .2 M NaCHO2. The pH of the solu...

A: Given values-> Volume of HCHO2 = 25ml Molarity of HCHO2 = 0.1 M Volume of NaCHO2 = 25 ml Molarity...

Q: Hydrogen (H,) gas and oxygen (o,) gas react to form water (H,O) vapor. Suppose you have 5.0 mol of H...

A: This problem can be solved by using limiting and excess reagent concept

Q: A sample of solid NH,NO3 was placed in an empty container. It decomposes according to the following ...

A: Ammonium nitrate decomposes into nitrogen oxide and water. The equation for the balanced chemical re...

Q: In separate titrations, equal volumes of 0.1 M HCl and 0.1 M HC2H3O2 (weak acid) are titrated with 0...

A: Acid-base titration is a volumetric titration that is based on neutralization reaction between acid ...

Ionic Equilibrium

Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.

Arrhenius Acid

Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red. 

Bronsted Lowry Base In Inorganic Chemistry

Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.