A buffer is prepared using 0.15 M HF and 0.15 M NaF. What is the pH of this buffer? pKa for HF is 3.1.

Q: Explain the effect of molecular weight concentration on the refractive indexs e 9:50

A: The refractive index depends on the molecular weight of the polymer at its small values. See the lin...

Q: 13, Silver chloride is a sparingly soluble salt with a solubility product constant, Ksp 1.8x10-10. a...

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Q: y of transition AS=A,

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Q: Which one of the folllowing samples contains the most atoms? Hint. Think about definitions:I am look...

A: Which one of the following samples contains the most atoms? 

Q: Black Forest Biologicals, a biotech startup, has a promising Alzheimer's drug candidate Compound SLT...

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Q: A set of samples from an abandoned industrial site detected a suspected groundwater contaminant at a...

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Q: Write the charge of each ion using the format +1 or -1. You must put a positive or negative sign Wha...

A: Write charge of each ion of the following---  

Q: Find the oxidation number for each element in the following substance. UO22+ 1. U = 2. O =

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Q: B. How many moles of silver will be formed when 5.00 mol of copper react with excess silver nitrate?...

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Q: If calcium carbonate were slightly soluble in water, would your percent yield be higher, lower, or u...

A: What is the effect of solubility of calcium carbonate in water on percent yield. 

Q: The following are the goal of chemical spearation process, EXCEPT?      isolation of the analyte ...

A: Goal of chemical seperation process:

Q: What type of elution uses different proportions of solvent during separation process?

A: Elution is a process of separating one from a mixture by using eluent or solvent. By solvent extract...

Q: doubationship of rate = k[X1TY1,Jf the concentration of X is tripled and the concentration of Ys dou...

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Q: Match all the indicated areas/points of the titration curve provided to their descriptions related t...

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Q: A solution contains 0.266 M sodium hypochlorite and 0.133 M hypochlorous acid. The pH of this soluti...

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Q: Give the number of protons, neutrons, and electrons for 5°C0 protons neutrons electrons

A: Given, Element : Cobalt (59Co) Mass number of Co = 59 Atomic number of Co = 27 Number of protons = ?...

Q: The reaction X+ X3 2 X2 is shown to have an activation energy of 57 kJ/mol while the enthalpy of rea...

A:  Activation energy is the minimum amount of energy required to the transition state. Enthalpy of rea...

Q: A 5.00 L tank at 3.7 "C is filed with 5.14 g of dinitrogen monoxide gas and 10.2 g of sulfur tetrafl...

A: Given mass of dinitrogen monoxide = 5.14 gram Given mass of sulphur tetrafluoride = 10.2 gram

Q: rsible Reactions ar Regression Analysis nod of Initial Rates lity of Rates tion Method osed Mechanis...

A: Rate law is experimentally determined law, According to this law, rate of a chemical reaction is dir...

Q: What mass of zinc sulfide 19 5. The addition of concentrated hydrochloric acid to manganese (IV) oxi...

A: Given: Mass of HCl= 4.76×10-2g Mass of MnO2 = excess

Q: 2. Carbonic acid (H2CO3) has an acid dissociation constant of 4.3 x 10 -7. Calculate the equilibrium...

A: We have to predict the concentration of carbonic acid at equilibrium   

Q: The nutritional label on a bottle of soy sauce indicates that one serving (15 mL) of soy sauce conta...

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Q: For this lab, 2 Lof 0.0020 M Fe(NO3)3 needed to be prepared. How many grams of Fe(NO3)3 needed to be...

A: Molarity is moles of substance present per liter volume.  Molarity= moles of substance/ volume From ...

Q: Listen In an aqueous solution of ammonium nitrate, NH¼NO3, which intermolecular forces are present? ...

A: Intermolecular forces   Intramolecular forces are the forces that hold atoms together within a  mole...

Q: (b) What is the value of E if the concentration of Cd²* is 5.88 x 10° and the concentration of Mn²* ...

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Q: .37 A calorimeter contained 75.0 g of water at 16.95°C. A 93.3-g sample of iron at 65.58°C was place...

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Q: Copper (II) sulphate has been used extensively as a fungicide (kills fungus) and herbicide (kills pl...

A: Mass of CuO = 9.20 g  Mass of Sulphuric acid = 6.70 g 

Q: . Calculate the pH of a solution in which the con- centration of the piperidine is (a) 1.00 × 10-' M...

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Q: A 44.20 mL sample of phenol (Ka=1.60x10-10) analyte with a concentration of 0.113 mol L-1 is titrate...

A: We have to calculate the pH at equivalence point.  

Q: Ethylene gas and steam at 420 °C and atmospheric pressure are fed to a reaction process as an equimo...

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Q: A solution contains 0.252 M sodium nitrite and 0.179 M nitrous acid. The pH of this solution is

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Q: 1. When a 1.010-g sample of sucrose (C12H22011) is burned in a bomb calorimeter, the temperature ris...

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Q: Determine the rate law for the reaction A + B → C + D given the following experiment data. Initial T...

A: To find the rate law, first find order of reaction with respect to each reactant.

Q: A student set up a titration apparatus that involved using 25.9 mL of 1.57 M acetic acid. The acetic...

A: Given : volume of acetic acid = 25.9 ml Molarity of acetic acid = 1.57 M Molarity of NaOH =0.154 M K...

Q: Write the balanced chemical equation associated with the formation constant, Kf, for each complex io...

A: The formation constant or stability constant for a compound is an equilibrium constant for the chemi...

Q: "As the piston moves, the volume of the cylinder changes. The total volume of the air in the system ...

A: The volume always changes as the piston moves inward or out word ( expansion or compression ) 

Q: Predict the products for each of the following reactions and provide an explanation for the stereoch...

A: Diels-Alder reaction : is a reaction between diene and dienophile gives a six membered cyclic ring. ...

Q: Predict the product and balance  redox reaction As2S3 + conc HNO3  =

A: The product of the reaction is, As2S3 + conc.HNO3→H3AsO4+H2SO4+NO2 ​       ​   ​  

Q: A chemist needs to create a 50% HCI solution. (HCI is hydrochloric acid.A "50% HCI solution" contain...

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Q: • KDH

A: 1.KOH is a strong base with a polar ionic character as oxygen and potassium has difference in electr...

Q: Select the three methods typically used to determine an experimental rate law: Reversible Reactions ...

A: The rate law can be determined experimentally using the method of initial rates, isolation method an...

Q: A 50.00 mi. sample of a sodium hydroxide solution is titrated with a 1.605 M solution of sulfuric ac...

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Q: What effect does a catalyst have on the activation energy of the reaction? In the graphs below draw ...

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Q: Aluminum carbide, Al4C3, is a yellow powder that reacts with water to produce aluminum hydroxide and...

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Q: Calculate the pH of a water that contains 0.658 mg/L of carbonic acid. Assume that [H*]=[HCO3] at eq...

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Q: Find the mass of a piece of copper when 8000.0 J of heat are applied, causing a 45°C increase in tem...

A: Given :-  q (heat absorbed) = 8000.0 J  change in temperature = 45°C  To calculate :-  mass of coppe...

Q: Part A A gas nample has a volume of 4210 mL at 18 "C and 735 mmHg What is the final temperature, in ...

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Q: Place the following terms with the Carrect Denelit: han Specific heat es dosity in the Said State Co...

A: Water provides an environment inside a cell that allows many chemical reactions to occur.     

Q: Write Short paragraph about heterogeneous coloidal solution.

A: A colloid is a heterogeneous mixture in which dispersed particles have an intermediate size of solut...

Q: 1.0 mol NaH2PO4 and 1.0 mol Na2HPO4 are added to sufficient water to give a 1L buffer solution. Indi...

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.