A 103.9 mL sample of 0.108 M HCI is mixed with 32.2 mL of 0.088 M NH3. What is the resulting pH? (The Kp for NH3 = 1.8 x 10-5).

Q: A 50.0 mL sample of 0.100 M NH3 is titrated with 0.100 M HBr. What is the most likely pH of the…

A: The pH of the solution is the power of protons in the solution. While pOH is related to the basicity…

Q: A buffer is composed of 0.200 M (CH3)2NH (Kb = 5.9 x 10-4) and O.250 M (CH3)2NH2NO3 . What is the pH…

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Q: Methyl red has a pk, of 5.0 and is red in its acid form and yellow in its basic form. If several…

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Q: Acetic acid is a weak monoprotic acid with K, = 1.77 x 10. NaOH(s) was gradually added to 1.00 L of…

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Q: 10mL of a 0.28 M solution of acetic acid, Ka = 1.8 x 10-5,  is added to a 20mL of 0.18 M solution of…

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Q: What you expect to observe on mixing 0.1M AgNO3 with 6M NaOH. Will there be a color? Will bubbles…

A: Silver oxide - a displacement reaction occurs, but silver hydroxide isn’t thermodynamically stable…

Q: A 25.00 mL sample of 0.12 M nitric acid is being titrated with 0.15 M NaOH. What is the pH after…

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Q: Consider the reaction of a 20.0 mL of 0.220 M C̟H̟NHCI (Ka = 5.9 x 10*) with 12.0 mL of 0.241 M…

A: Given molarity of C5H5NHCl or C5H5NH+ = 0.220 M  Volume of C5H5NHCl solution = 20.0 mL = 0.020 L…

Q: A buffer solution is prepared by dissolving  1.300 g  of ammonium chloride (NH4Cl) into  100.00 mL…

A: Mass of ammonium chloride is 1.3 g. Molar mass of ammonium chloride is 53.491 g/mol.

Q: Consider a 0.010 mol L-1 solution of Fe3+, calculate the pH value that will begin and end the…

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Q: Consider the titration of a 60.0 mL of 0.317 M weak acid HA (Ka = 4.2 x 10⁻⁶) with 0.400 M KOH.…

A: Chemical equation: HA (aq)  +    KOH (aq)  ------->   KA (aq)   +   H2O Number of mmols of KA…

Q: A 50.0 ml sample of 0.200 M HNO2 (weak acid) is titrated with 0.400 M KOH. Calculate the pH after…

A: Neutralization reaction is a type of chemical reaction that occurs between acid and base resulting…

Q: -1 A 75.0-mL volume of 0.200 mol L NH3 (Kp = 1.8 × 10-3) is titrated with 0.500 mol L HNO3.…

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Q: What is the pH of a buffer made from 0.350 mol of HBrO (Ka = 2.5 × 10⁻⁹) and 0.150 mol of KBrO in…

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Q: Please solve and show equations used and steps for a, b, & c

A: Molar solubility of Pb3(PO4)2 is calculated.

Q: 50.0 ml of 0.1 M NaOH is added to 100.0 ml of 0.2 M HCN (Ka=6.2x10-10). What is the pH of the…

A: A buffer solution is a mixture of weak acid and its conjugate base or weak base and it's conjugate…

Q: Consider a buffer made by adding 132.8 g of NaC,H;O2 to 300.0 mL of 1.31 M HC,H;O2 (Ka = 6.3 x 105)…

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Q: A groundwater source is very acidic and contaminated with 15.3 mg/L copper (Cu2"). To what pH must…

A: The precipitate is formed when the two soluble salts are combined and produce the insoluble salt and…

Q: - If a 1.0 M solution of NaOH is slowly titrated (dripped) into a 0.050 M solution of Mn2 (aq), what…

A: Given : Concentration of Mn2+ = 0.050 M  And pH of solution becomes 8.00  Since pH = 14 + log[OH- ]…

Q: What volume of 0.110 M Hydrochloric acid needs to be added to 30 mL of 0.100 M ammonia to make a…

A: We know the Henderson-Hasselback equation is, pH=pKa +salt/acid Given Value;   The concentration of…

Q: To an aqueous solution originally containing 1.0 x 10^-4 mol/L Ag+ was added enough of the weak acid…

A: Precipitation of AgCN occurs when the product of concentrations of ions formed equals Ksp. Ksp is…

Q: A solution is prepared by dissolving 1.800 g of sodium acetate (CH3COONa) into 100.00 mL of a 0.180…

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Q: Consider the titration of 25.0 mL 0.175 M CH3COOH (Ka 1.8 X 105) with 0.105 M aqueous NaOH. a. Write…

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Q: Will CaSO4 precipitate if 50 mL of 0.0010 M CaCl2 is added to 50 mL of 0.010 M Na2SO4?

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Q: What you expect to observe on mixing 0.1M Na2CO3 with HCl. Will there be a color? Will bubbles form?…

A: Balanced chemical equation: Na2CO3 (aq)  +  2HCl  (aq) ------>  2NaCl (aq)  +  H2O (l)  +  CO2…

Q: A 100mL sample of 0.20M HF is titrated with 0.10M KOH. What is the pH of the solution after the…

A: HF is a weak monoprotic acid with Ka = 3.5*10-4  KOH is a strong monoacidic base.

Q: What you expect to observe on mixing 6M NH3 with HCl. Will there be a color? Will bubbles form? Will…

A: Given: Mixing of 6M ammonia with hydrogen chloride solution To find: colour, bubbles formation,…

Q: A sample of 50.0 mL of 2.0 M HNO, (pKa=3.398) is titrated with 1.0 M KOH. Determine the pH after the…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: What you expect to observe on mixing 0.1M Zn(CO3)2 with 6M NH3. Will there be a color? Will bubbles…

A: The question is based on qualitative analysis. we have to describe the observations taking place.

Q: What mass (in grams) of sodium acetate (CH3COONa) must be added to 100.00 mL of a 0.127 M solution…

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Q: [20] ml of [4] M HC2H3O2 is titrated with 2.25 M sodium hydroxide. Ka for HC2H3O2 is 1.8 x 10-5 d.…

A: Given: Concentration of HC2H3O2 (assuming it HA) = 4 M The volume of HA taken = 20 mL And the…

Q: ) Lead(II) hydroxide, Pb(OH)2 consists of lead(II) ion and hydroxide ion. Given that Kyp value of…

A: Solubility product is an equilibrium constant which is determined by multiplying the concentration…

Q: What is the pH of a buffer that contains 0.250 mol of CH3NH2 and 0.450 mole of CH3NH3CI? Kb for…

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Q: a. What is the pH of an aqueous solution of 100.0 mL with 1.00 mmol Ca(OH)2 (74.1 mg) dissolved in…

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Q: How many moles of CH,NH,CI need to be added to 200.0 mL of a 0.500 M solution of CH,NH, (Kb for…

A: pH is the negative logarithm of H+ concentration to the base 10 represented by: pH = -logH+ For a…

Q: A 5.55-g sample of a weak acid with Ka = 1.3 × 10-4 is combined with 5.00 mL of 6.00 M NaOH and the…

A: The general reaction between NaOH and diprotic acid is as follows,

Q: A 22.2 mL sample of 0.329 M methylamine, CH3NH2, is titrated with 0.315 M perchloric acid. At the…

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Q: A buffer solution is composed of 1.923 g of KH,PO4 and 4.699 g of Naz HPO4. (K, for dihydrogen…

A: The pH of this buffer solution would be calculated using Henderson-Hassalbalch equation .

Q: At pH 10.0, only 0.019 g of MgCl2 will dissolve per 1 L of solution. What is the Ksp of magnesium…

A: The pH is given as 10.0 Therefore pOH = 14-pH = 14-10.0 =4.0 Then the pOH = -log[OH-] So, [OH-] =…

Q: A volume of 500.0 mL of 0.180 M NaOH is added to 545 mL of 0.250 M weak acid (K, = 6.39 x 105). What…

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Q: A 10.0 mL sample of 0.15 M HCIO is titrated with 0.15 M KOH. What is the pH at the equivalence…

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Q: A buffer is prepared by mixing 204.0 mL of 0.452 M HCl and 0.500 L of 0.400 M sodium acetate…

A: Any particular buffer solution's pH can be derived by Henderson-Hasselbalch expression. Buffer…

Q: What is the pH of a buffer made from 0.580 mol of CH₃NH₂ (Kb = 4.4 × 10⁻⁴) and 0.230 mol of CH₃NH₃I?

A: g Given: A buffer solution is made with 0.580 mol of CH3NH2 and 0.230 mol of CH3NH3I. Kb of CH3NH2…

Q: Consider the titration of 15.75 mL of 0.549 M potassium propanoate, CH3CH;CO,K, with 0.207 M HNO3.…

A: Given : Concentration of CH3CH2CO2K = 0.549 M Volume of CH3CH2CO2K solution = 15.75 mL = 0.01575 L…

Q: Consider a buffer made by adding 52.3 g of (CH3),NH,l to 250.0 mL of 1.42 M (CH3)2NH (Kb = 5.4 x…

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Q: How many grams of NH4CI would have to be added to 250.0 mL of a 0.420 M NH3 solution to prepare a…

A: The minimum concentration of NH4Cl that must be present in the solution to have a pH of 10 is;…

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.