Recent questions without a selected answer

0 votes

1 answer 115 views

What strategies can a chemistry student utilize to comprehend and master complex chemical concepts effectively?

asked Jan 30 in Chemical education by TamikaCarril (2.2k points)

0 votes

1 answer 89 views

What techniques or strategies can a chemistry student use to better understand complex chemical concepts, and how can these be incorporated into their study habits and practice?

asked Jan 30 in Chemical education by MartyKindler (1.5k points)

0 votes

1 answer 112 views

What is the mechanism of the acid-catalyzed formation of an ether from an alcohol and the reaction of an alkene with a peroxyacid to produce an epoxide? Provide the steps involved in both reactions and explain the factors that influence the yield of the products.

asked Jan 30 in Organic Chemistry by MamieSanmigu (1.8k points)

0 votes

1 answer 47 views

How can a chemical engineer develop a process for the production of 1,4-dioxane?

asked Jan 30 in Chemical engineering by AllanKew2295 (2.0k points)

0 votes

1 answer 107 views

Identify the number of stereoisomers for the compound 1,2-dichlorocyclopentane, and draw the structures for each stereoisomer, indicating which one is a meso compound.

asked Jan 30 in Organic Chemistry by CedricNicker (1.9k points)

0 votes

1 answer 85 views

Using principles of inorganic chemistry, predict the stability of the following two inorganic compounds: 1) Sodium chloride (NaCl)2) Ammonium chloride (NH4Cl) Briefly explain the factors contributing to the stability of each compound based on their structures and bonding.

asked Jan 30 in Inorganic Chemistry by MonteEsteban (1.8k points)

0 votes

1 answer 116 views

Identify whether the following solids are ionic, covalent, or metallic: (i) NaCl, (ii) CO2, (iii) Fe, (iv) SiO2, (v) Ag. Justify your answer with proper reasoning for each compound.

asked Jan 30 in Inorganic Chemistry by JuanitaShear (2.4k points)

+1 vote

1 answer 97 views

What is the concentration of lead (Pb) ions in a sample of a water source using the method of polarography?

asked Jan 30 in Analytical Chemistry by EarnestSprin (1.5k points)

+1 vote

1 answer 82 views

What is the concentration of lead (Pb) ions in a given water sample using voltammetry with a reference electrode?

asked Jan 30 in Analytical Chemistry by ShaneY52932 (2.0k points)

+1 vote

1 answer 102 views

What is the concentration of lead (Pb) in a water sample, in units of micrograms per liter (µg/L), if the atomic absorption spectroscopy analysis showed an absorbance value of 0.456 at a wavelength of 283.3 nm?

asked Jan 30 in Analytical Chemistry by IDQMyles1187 (2.5k points)

+1 vote

1 answer 88 views

What is the concentration of lead (Pb) in a water sample collected from a local river, and how does it compare to the maximum permissible limit set by the World Health Organization (WHO)? Determine the answer using atomic absorption spectroscopy and provide a detailed report including instrumental parameters, experimental procedure, and results.

asked Jan 30 in Analytical Chemistry by ZellaSeamon3 (1.6k points)

0 votes

1 answer 81 views

What is the concentration of lead (Pb) in a water sample collected from a industrial site using atomic absorption spectroscopy?

asked Jan 30 in Analytical Chemistry by DevonHamlett (2.3k points)

0 votes

1 answer 103 views

What is the concentration of lead (Pb) in a soil sample collected from a playground using X-ray fluorescence spectroscopy?

asked Jan 30 in Analytical Chemistry by AsaYty57562 (2.1k points)

0 votes

1 answer 76 views

What is the concentration of lead (Pb) in a drinking water sample using cyclic voltammetry?

asked Jan 30 in Analytical Chemistry by VirgilioAbe5 (1.9k points)

0 votes

1 answer 79 views

What is the concentration of lead (Pb) and cadmium (Cd) in a water sample collected from a polluted river using atomic absorption spectroscopy?

asked Jan 30 in Analytical Chemistry by EloiseGrimm2 (1.9k points)

0 votes

1 answer 114 views

What is the concentration of iron(II) sulfate in a sample of water taken from a lake, using spectrophotometry with a known molar absorptivity of 11,300 L/mol*cm, if the absorbance of the sample is measured to be 0.423 at a wavelength of 510 nm?

asked Jan 30 in Analytical Chemistry by ZellaSeamon3 (1.6k points)

0 votes

1 answer 94 views

What is the concentration of iron(II) sulfate in a 20 mL sample solution that has an absorbance of 0.45 at 562 nm, given that the molar extinction coefficient of iron(II) sulfate at that wavelength is 7,590 M^-1cm^-1?

asked Jan 30 in Analytical Chemistry by AudreaV25265 (2.0k points)

0 votes

1 answer 106 views

What is the concentration of iron(II) ions in a water sample that has an absorbance of 0.55 at 510 nm when treated with a standard solution of 4.65 x 10^-5 M iron(II) sulfate using colorimetry?

asked Jan 30 in Analytical Chemistry by LawrenceMcGr (1.8k points)

0 votes

1 answer 90 views

What is the concentration of iron(II) ions in a sample of water collected from a local pond using colorimetry, if the measured absorbance of the sample at 565 nm is 0.673 and the molar absorptivity of the iron(II) complex at this wavelength is 20,500 M⁻¹·cm⁻¹?

asked Jan 30 in Analytical Chemistry by MOIRoderick9 (1.8k points)

0 votes

1 answer 72 views

What is the concentration of iron ions in a water sample collected from a local lake using polarography technique?

asked Jan 30 in Analytical Chemistry by ChristelIdr7 (1.7k points)

Recent questions without a selected answer

Categories