Chem 1A Practice Final
... volume. Considering only N2 and O2 in air, calculate the density of air at 1.0 atm, 25 oC. a) 0.590 g/L b) 1.18 g/L c) 2.46 g/L d) 14.1 g/L e) None of the above. 24. What kind of gases have low values of a in the van der Waals equation? a. Gases which have no affinity of each other b. Gases with a l ...
... volume. Considering only N2 and O2 in air, calculate the density of air at 1.0 atm, 25 oC. a) 0.590 g/L b) 1.18 g/L c) 2.46 g/L d) 14.1 g/L e) None of the above. 24. What kind of gases have low values of a in the van der Waals equation? a. Gases which have no affinity of each other b. Gases with a l ...
Chapter 4 Packet
... and reduction by assigning oxidation numbers to atoms in molecules and ions. 9. identify the applications of redox reactions. 10. use the activity series to predict whether a reaction will occur when a metal is added to an aqueous solution of either a metal salt or an acid; and write the balanced mo ...
... and reduction by assigning oxidation numbers to atoms in molecules and ions. 9. identify the applications of redox reactions. 10. use the activity series to predict whether a reaction will occur when a metal is added to an aqueous solution of either a metal salt or an acid; and write the balanced mo ...
AP Chemistry Note Outline
... 2. Balance atoms other than H & O 3. Balance oxygen by adding H2O to the side that needs O 4. Balance hydrogen by adding H+ to the side that needs H 5. Balance the charge by adding electrons 6. Make the number of electrons gained equal to the number lost and then add the two halfreactions 7. Cancel ...
... 2. Balance atoms other than H & O 3. Balance oxygen by adding H2O to the side that needs O 4. Balance hydrogen by adding H+ to the side that needs H 5. Balance the charge by adding electrons 6. Make the number of electrons gained equal to the number lost and then add the two halfreactions 7. Cancel ...
Studies on some essential amino acids: Synthesis of methyl esters
... Materials and Reagents All the chemicals and reagents were obtained from Sigma Aldrich and Biochem. Melting points were measured using BUCHI 540 apparatus and are uncorrected, IR spectra were recorded as potassium bromide pellets on a Shimadzu 8300 spectrophotometer (ῡ max in cm−1), The 1H and 13C N ...
... Materials and Reagents All the chemicals and reagents were obtained from Sigma Aldrich and Biochem. Melting points were measured using BUCHI 540 apparatus and are uncorrected, IR spectra were recorded as potassium bromide pellets on a Shimadzu 8300 spectrophotometer (ῡ max in cm−1), The 1H and 13C N ...
Ch 3 Chemical Reactions 2013-Sept-08
... completely ionized. NaCl (s) H2O / NaCl Solution Na+ (aq) + Cl- (aq) Dissolving 1 mole of NaCl in water gives one mole of Na+ and 1 mole of Cl-. It is 100% dissociated Dissolving 1 mole of BaCl2 in water gives one mole of Ba2+ and 2 moles of ClBaCl2 (s) H2O / BaCl2 Solution Ba2+ (aq) + 2 Cl- ...
... completely ionized. NaCl (s) H2O / NaCl Solution Na+ (aq) + Cl- (aq) Dissolving 1 mole of NaCl in water gives one mole of Na+ and 1 mole of Cl-. It is 100% dissociated Dissolving 1 mole of BaCl2 in water gives one mole of Ba2+ and 2 moles of ClBaCl2 (s) H2O / BaCl2 Solution Ba2+ (aq) + 2 Cl- ...
Document
... the anions and cations are separated from each other. This is called dissociation. – However, not all ionic compounds are soluble in water! • When compounds containing polyatomic ions dissociate, the polyatomic group stays together as one ion. • When molecular compounds dissolve in water, the only o ...
... the anions and cations are separated from each other. This is called dissociation. – However, not all ionic compounds are soluble in water! • When compounds containing polyatomic ions dissociate, the polyatomic group stays together as one ion. • When molecular compounds dissolve in water, the only o ...
File - Varsity Field
... • H3O+ (aq) + OH- (aq) → 2 H2O (ℓ) • This is always the net ionic equation when a strong acid reacts with a strong base. → Neutralisation reaction i.e. on completion of reaction, if the same number of moles of acid and base are mixed, the solution is neutral. • Other ions remain unchanged – Na+ (aq) ...
... • H3O+ (aq) + OH- (aq) → 2 H2O (ℓ) • This is always the net ionic equation when a strong acid reacts with a strong base. → Neutralisation reaction i.e. on completion of reaction, if the same number of moles of acid and base are mixed, the solution is neutral. • Other ions remain unchanged – Na+ (aq) ...
Toluenediamine
... used directly for the further production of TDI. A separation of the 2,4- and 2,6-isomers is only carried out in minor amounts for special applications. For economic reasons it is preferable to use azeotropic or subazeotropic nitric acid (60–68 wt.%) instead of the more reactive but also more expens ...
... used directly for the further production of TDI. A separation of the 2,4- and 2,6-isomers is only carried out in minor amounts for special applications. For economic reasons it is preferable to use azeotropic or subazeotropic nitric acid (60–68 wt.%) instead of the more reactive but also more expens ...
Semester Exam Review
... (d) Describe how the value of the acid-dissociation constant, Ka, for the weak acid HX could be determined from the titration curve in part (c). (e) The graph below shows the results obtained by titrating a different weak acid, H2Y, with the standardized NaOH solution. Identify the negative ion tha ...
... (d) Describe how the value of the acid-dissociation constant, Ka, for the weak acid HX could be determined from the titration curve in part (c). (e) The graph below shows the results obtained by titrating a different weak acid, H2Y, with the standardized NaOH solution. Identify the negative ion tha ...
Naming Chemical Compounds
... Sodium is in group 1 so its oxidation number is 1+. Phosphide is short for phosphorus. Its oxidation number must be negative since it’s the 2nd name so phosphide has a charge of 3-. If the total charge is going to add Na1+ P3up to zero 3 Na1+ and 1 P3- must be ...
... Sodium is in group 1 so its oxidation number is 1+. Phosphide is short for phosphorus. Its oxidation number must be negative since it’s the 2nd name so phosphide has a charge of 3-. If the total charge is going to add Na1+ P3up to zero 3 Na1+ and 1 P3- must be ...
Multiple Choice Practice. A) P B) S C) Cl D) Li E) 1 F 1. Has the
... When the half reaction above is balanced, how many moles of electrons are needed for every mole of I2 formed by this half-reaction? A) 2 B) 6 C) 8 D) 10 E) 12 30. Which of the following is always true at the triple point of a pure substance? A) The vapor pressure of the solid phase equals the vapor ...
... When the half reaction above is balanced, how many moles of electrons are needed for every mole of I2 formed by this half-reaction? A) 2 B) 6 C) 8 D) 10 E) 12 30. Which of the following is always true at the triple point of a pure substance? A) The vapor pressure of the solid phase equals the vapor ...
Chemical Reactions
... Note the number of moles of gas on the left-hand side and the number of moles of gas on the righthand side. When the volume of the system is changed, the partial pressures of the gases change. If we were to decrease pressure by increasing volume, the equilibrium of the above reaction will shift to t ...
... Note the number of moles of gas on the left-hand side and the number of moles of gas on the righthand side. When the volume of the system is changed, the partial pressures of the gases change. If we were to decrease pressure by increasing volume, the equilibrium of the above reaction will shift to t ...
AP Chem Summer Assign Gen Chem Rev Problems
... The following equilibrium reaction is placed on a hot plate: H2O(l) + heat ⇔ H2O(g) a. In which direction does the reaction shift? b. The concentration of the reactant (increases, decreases, or remains the same)? c. The pressure inside the container (increases, decreases, or remains the same)? 19. H ...
... The following equilibrium reaction is placed on a hot plate: H2O(l) + heat ⇔ H2O(g) a. In which direction does the reaction shift? b. The concentration of the reactant (increases, decreases, or remains the same)? c. The pressure inside the container (increases, decreases, or remains the same)? 19. H ...
Aqueous chemistry is a very important component to laboratory
... In an acid-base titration, an indicator is used to show the change from an acidic situation (all acid), and as the base is slowly added and neutralization occurs, the color shift will be towards the basic side. When the moles of acid = moles of base neutralization is said to occur. We note this by t ...
... In an acid-base titration, an indicator is used to show the change from an acidic situation (all acid), and as the base is slowly added and neutralization occurs, the color shift will be towards the basic side. When the moles of acid = moles of base neutralization is said to occur. We note this by t ...
Click Here To File
... (a) Due to stronger H-F bond than HCl bond, HF ionises less readily than HCl in aqueous solution to give H+ions. Therefore HF is a weaker acid than HCl. (b) In solid state, PCl5 consists of ions [PCl4]+[PCl6]−. On melting these ions become free to move and hence conducts electricity in the molten st ...
... (a) Due to stronger H-F bond than HCl bond, HF ionises less readily than HCl in aqueous solution to give H+ions. Therefore HF is a weaker acid than HCl. (b) In solid state, PCl5 consists of ions [PCl4]+[PCl6]−. On melting these ions become free to move and hence conducts electricity in the molten st ...
1. Natures Chemistry Unit Questions
... (a) Draw a structural formula for the product formed when propanone is used instead of ethanal in this type of reaction. (1) (b) Name an aldehyde that would not take part in an aldol condensation. (1) (c) Apart from the structure of the reactants, suggest what is unusual about applying the term “con ...
... (a) Draw a structural formula for the product formed when propanone is used instead of ethanal in this type of reaction. (1) (b) Name an aldehyde that would not take part in an aldol condensation. (1) (c) Apart from the structure of the reactants, suggest what is unusual about applying the term “con ...
Chapter 4 - GEOCITIES.ws
... depending on how many hydrogens it donates. Ionization reactions- acid donates a proton to water to form a hydronium ion. You can only donate 1 proton at a time. HCl(aq) H+ + Cl- ...
... depending on how many hydrogens it donates. Ionization reactions- acid donates a proton to water to form a hydronium ion. You can only donate 1 proton at a time. HCl(aq) H+ + Cl- ...
Chemistry to Remember
... via a barometer. A barometer measures the displacement of a column of mercury by air pressure. Standard pressure is 760 mm of mercury or 1 atmosphere (atm), specifically; the air pressure at sea level supports a column of mercury 760 mm high. Today’s technology uses this basic measurement to calibra ...
... via a barometer. A barometer measures the displacement of a column of mercury by air pressure. Standard pressure is 760 mm of mercury or 1 atmosphere (atm), specifically; the air pressure at sea level supports a column of mercury 760 mm high. Today’s technology uses this basic measurement to calibra ...
2004 NEACS Ashdown Exam 1. The allotrope of carbon shown to
... 20. How many of the following would shift this reaction to the right? PbO2(s) + 4 H+(aq) + Cu(s) Ù Pb2+(aq)+ 2 H2O + Cu2+(aq) Acid is added. PbO2 is added. The [Pb2+] is increased. The pH is increased. Sulfide ion is added. (A) 1 (B) 2 (C) 3 (D) 4 21. Concentrated phosphoric acid, H3PO4, is 85.0% H3 ...
... 20. How many of the following would shift this reaction to the right? PbO2(s) + 4 H+(aq) + Cu(s) Ù Pb2+(aq)+ 2 H2O + Cu2+(aq) Acid is added. PbO2 is added. The [Pb2+] is increased. The pH is increased. Sulfide ion is added. (A) 1 (B) 2 (C) 3 (D) 4 21. Concentrated phosphoric acid, H3PO4, is 85.0% H3 ...
WRITING AP EQUATIONS AP equation sets are found in the free
... Acids react with bases to produce salts and water. One mole of hydrogen ions react with one mole of hydroxide ions to produce one mole of water. ...
... Acids react with bases to produce salts and water. One mole of hydrogen ions react with one mole of hydroxide ions to produce one mole of water. ...
WRITING AP EQUATIONS AP equation sets are found in the
... Acids react with bases to produce salts and water. One mole of hydrogen ions react with one mole of hydroxide ions to produce one mole of water. ...
... Acids react with bases to produce salts and water. One mole of hydrogen ions react with one mole of hydroxide ions to produce one mole of water. ...
CHEM 32-002
... 5) (7 points) Chloroform (CHCl3) is an important industrial chemical: it also has been used as a cleaning solvent and as a general anesthetic. It is manufactured by the following reaction: 3 Cl2 + CH4 CHCl3 + 3 HCl If you allow 100 grams of CH4 to react with Cl2, how many grams of HCl will you mak ...
... 5) (7 points) Chloroform (CHCl3) is an important industrial chemical: it also has been used as a cleaning solvent and as a general anesthetic. It is manufactured by the following reaction: 3 Cl2 + CH4 CHCl3 + 3 HCl If you allow 100 grams of CH4 to react with Cl2, how many grams of HCl will you mak ...
Monitoring Reactions by TLC The fastest and most commonly used
... • For amines and aminoacids: 4:1:1 or 2:1:1 n-butanol-water-acetic acid. (4) a 10 mL graduated cylinder (5) supply of disposable hand-drawn glass capillaries. These can be conveniently made by heating a disposable pipette over a Fischer burner then until it is red ...
... • For amines and aminoacids: 4:1:1 or 2:1:1 n-butanol-water-acetic acid. (4) a 10 mL graduated cylinder (5) supply of disposable hand-drawn glass capillaries. These can be conveniently made by heating a disposable pipette over a Fischer burner then until it is red ...
AP CHEMISTRY - An Incomplete List of Topics
... Types of acid/base - Bronsted-Lowry, Arrhenius, Lewis: (Remember Lewis is the opposite of Bronsted-Lowry) Know formulas of strong acids and bases Be able to calculate the Ka for either a strong or weak acid/base dissociation Know the chemical equation for either a strong or weak acid/base dissociati ...
... Types of acid/base - Bronsted-Lowry, Arrhenius, Lewis: (Remember Lewis is the opposite of Bronsted-Lowry) Know formulas of strong acids and bases Be able to calculate the Ka for either a strong or weak acid/base dissociation Know the chemical equation for either a strong or weak acid/base dissociati ...