The concentration of ammonia in a water sample can be measured by electrode. Why does the pH of each sample need to be adjusted with NaOH prior to measurement?

Q: temperature k 203.0 °C 2.4 x 1011 309.0 °C 5.8 x 1011

A: T1=203.0°C = 203.0 + 273 = 476 K T2=309.0°C = 309.0 + 273 = 582 K K1=2.4×1011 K2=5.8×1011

Q: (NEL), CO) 1 The molal boiling point elevation constant K =0.80 °C-kg mol for a certain substance X.…

A: Given : kb for X = 0.80°C.kg-1.mol-1  Mass of urea = 87.1 g  Mass of X = 750.0 g  Boiling point of…

Q: Aluminium has a density of 2.70 g/cm3. How many moles of aluminum are in a 13.2 | cm block of the…

A:

Q: Consider these two reactions: Reaction 1: 20F2(9) → O2(9) + 2 F2(g) AH=-49.4 kJ Reaction 2: N2 (g) +…

A: ->A reaction is spontaneous if ∆G<0 a reaction is non-spontaneous if ∆G>0.

Q: OH 1. PdL, EtyN, MoCN Me 2. NaBH MEOH HO 3. CI EtN. CH,C Me 7. MeO HN MeN Br Me

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Q: apeidure d 25% the Palebotes on unten i [7x10-3 M and M and 0:75 atm. slubidity diesdved coz at me…

A: According to Henry's law at constant temperature molar concentration of a gas in a liquid is in…

Q: Provide the appropriate reaagents or product. 1. PdoLn, EtgN,mecN Me -> 2. Na BH, MeOH 3. CI HO…

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Q: A 15 meter by 12 meter pool of water has a depth of 3.0 meters. What mass of silver ion is present…

A: Parts per million (PPM) is unit of measurement used in expressing very dilute concentration level of…

Q: Table 1. Smoke point and other physicochemical properties of commercial cooking oil samples. Cooking…

A:

Q: A solution is prepared at 25 °C that is initially 0.31M in propanoic acid (HC,H,CO,), a weak acid…

A: Given, Concentration of propanoic acid (HC2H5CO2) = [HC2H5CO2] = 0.31 M Concentration of potassium…

Q: What is the maximum mass of pure lead that could be extracted from 55.0 g of galena, a lead ore with…

A: The mass of galena, PbS is = 55.0 g The mass of lead that could be extracted from this galena is =?

Q: Calculate the solubility of PbF, in water at 25 °C. You'll find K, data in the ALEKS Data tab. Round…

A:

Q: (c) How can you distinguish between the members of each of the following pairs by UV-spectroscopy?…

A: To distinguish between the members of each of the following pairs by UV-spectroscopy:

Q: . For "II. Reaction of an alcohol with dichromate ion," the reaction shown is the conversion of the…

A: To write balanced half reaction , we would first write the conversions as given , then use steps to…

Q: . Use the second column of the table to explain the order of their boiling points. For example,…

A: Boiling point is the temperature at which vapor pressure of liquid is equals to atmospheric…

Q: Draw all possible stereoisomers for each of the following: (a) 2-chloro-3-hexanol (b)…

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Q: Draw the products of the following reactions.

A: In this question we have to tell the product of the reaction.

Q: If sea water contains 30 ppm gold, how many kilograms of sea water must be processed to remove 1.50…

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Q: A chemistry student weighs out 0.036 kg of an unknown solid compound X and adds it to 150. mL of…

A: Given that 0.036 kg of an unknown solid compound X is added to 150 mL of water at 17°C.After 10…

Q: Write the systematic (IUPAC) names for the molecules. CH3 H3C IUPAC name: H3C CH3 IUPAC name:

A: In this question we have to tell the IUPAC name of the given structure.

Q: B. A sample of penguinium (m=24.5 grams) is exposed to 133 joules and its temperature rises from 12C…

A: The specific heat capacity of a substance is given as the amount of heat that is required to…

Q: Test performed to unknown salt solution Addition of 3 M (NH4)2CO3 reagent Addition of 3% sodium…

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Q: how do i know if my aldol condensation is E or Z with the help of IR and NMR? what peaks should i be…

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Q: The acid dissociation constant K, of acetic acid (HCH,Co,) is 1.8 × 10. Calculate the pH of a 0.48M…

A: Given :  Concentration of acetic acid = 0.48 M  Ka of acid = 1.8 x 10-5   To calculate :  pH of…

Q: Is it logical to conclude that compounds ending in -al are generally aldehyde and those compounds…

A: The compound which have CHO as a functional group are called aldehyde .  Example :butanal…

Q: A chemistry student needs 70.0 g of tetrahydrofuran for an experiment. By consulting the CRC…

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Q: Classify the chemical reaction as combination (C), decompaosition (D), single replacement (SRI, or…

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Q: Questions 4 Carbon dioxide gas (1.00 moles) at 373 K occupies 536 ml at 50.0 atmosphere pressure.…

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Q: Nitrogen monoxide and hydrogen react to form nitrogen and water, like this: 2NO (g) + 2H2 (g) → N2…

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Q: Specific Heat Metal (J/g°C) Calcium 0.647 Iron 0.449 Silver 0.235 Gold 0.129 Ten grams of all four…

A: M

Q: concentration of either the hydionium ion or the hydroxide lon is known then the concentration of…

A: we need to determine if the given hydroxide ion concentration is acidic, basic or neutral

Q: Consider the reaction described by the equation C,H,Br, (aq) + 3I(aq) → C,H,(g) + 2 Br¯(aq) + I5…

A: The speed of the chemical reaction is measured in terms of rate  Here we are required to complete…

Q: 1. Using Hess's Law, determine the enthalpy of reaction for the combustion of methanol using the…

A: 2CH3OH + 3O2 -----> 2CO2(g) + 4H2O

Q: 1. NH3 CH2CH2CI excess 1) KOH NH 2) (CH3)2CHCH2CI 3) 'ОН, Н2О NANO2 NH HCI 2. 3.

A: Nitrogen is containing lone pair of electrons in its compounds and thus acts as a good nucleophile…

Q: dव्याळिट भhe ेर्न AO्रपजजeed energy ं 19.5- 8 ०+ h9uid mescu at 25.00'c is conerted to उुणात…

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Q: In an SN1 reaction, Nucleophile- What are the characteristics of a good nucleophile for SN1?   How…

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Q: a, radical polymerization of styrene to form polystyrene, using any radical initiator Ph Ph Ph b.…

A: Polymerization can be achieved by using its monomeric unit and repeating them for many times. Thus…

Q: A solution of sodium chlorite is prepared using 0.38 mol L1 NaOH as the solvent. The pK, of chlorous…

A: Solutions- Given- NaOH Conc. = 0.38 mol/lit, pKa of chlorous acid = 2, conc. of sodium chlorite =…

Q: 1. When Pearl added (NH4)2CO3 solution to an unknown salt solution in basic conditions, the solution…

A: Here we have predict which cation will not precipitate as carbonate when ammonium carbonate is added…

Q: 1. a) The graph shown on the right shows the titration curves of a 14 1 M solution of a weak acid…

A: Titration curve of weak acid and strong base is used for the determination of the strength of weak…

Q: In the Hall-Heroult process, a large electric current is passed through a solution of aluminum oxide…

A:

Q: 6.67 x 10-3 g of arsenic (As) is found in a 0.600 L sample of water. If the density of this sample…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: For pentane, the ∆H° of vaporization is 26.22 kJ/mol and the ∆S° of vaporization is 87.88 J/mol･K.…

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Q: 3.Plutonium isotope is present is Chernobyl nuclear accident and known to decay at a rate…

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Q: Consider these reactions: Reaction 1: H2 (g) + Cl2 (g) 2HCI(g) AH =-184.6 kJ %3D Reaction 2: 20F2(g)…

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Q: Which of the following processes are accompanied by an increase in entropy of the system? (No…

A: Entropy is the measure of randomness or disorder present in the system.  Entropy is maximum in case…

Q: Explain through the concept of bonding why water was found to expand by approximately 9% when it…

A: In Liquid form, water ( H2O) molecules are continuously moving. As a result of this, there is very…

Q: A chemist must prepare 600.0mL of nitric acid solution with a pH of 0.90 at 25°C. He will do this…

A: 600 mL of nitric acid solution has a pH of 0.90 at 25° C . Concentration of the stock nitric acid…

Q: The structure of a chiral isomer is given in the image. Draw the mirror image isomer. Use…

A: Mirror image is the image which is formed when mirror is placed in front of compound.

Q: An analytical chemist weighs out 0.278 g of an unknown diprotic acid into a 250 mL volumetric flask…

A: Given-> Weight of diprotic acid = 0.278 gm Volume of flask= 250 ml = 0.250 L (1 L = 1000 ml)…