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Simple-to-use pH electrodes with platinum diaphragms for reliable
... results. In addition to the greater ease of use, the maintenance requirement is lower and, at practically identical purchase costs, the shelf life is generally much higher. Due to the flexibility of sensors with platinum diaphragms, the user can often use the same sensor for very different applicati ...
... results. In addition to the greater ease of use, the maintenance requirement is lower and, at practically identical purchase costs, the shelf life is generally much higher. Due to the flexibility of sensors with platinum diaphragms, the user can often use the same sensor for very different applicati ...
Theoretical Competition - Austrian Chemistry Olympiad
... 5.2. Write down a balanced equation for the reaction of I- with H2O2! H2O2 + 2 H+ + 2 I- ⇌ 2 H2O + I2 5.3. Calculate the potential difference for the reaction in 5.2.. ΔEƟ = EƟ2 - EƟ1 = 1.763 – 0.535 = 1.228 V 5.4. Calculate the free standard enthalpy and the equilibrium constant for the reaction in ...
... 5.2. Write down a balanced equation for the reaction of I- with H2O2! H2O2 + 2 H+ + 2 I- ⇌ 2 H2O + I2 5.3. Calculate the potential difference for the reaction in 5.2.. ΔEƟ = EƟ2 - EƟ1 = 1.763 – 0.535 = 1.228 V 5.4. Calculate the free standard enthalpy and the equilibrium constant for the reaction in ...
Focus 4A-F
... showed that both heat and work are forms of energy; now know as the two fundamental concepts of thermodynamics. ...
... showed that both heat and work are forms of energy; now know as the two fundamental concepts of thermodynamics. ...
Covalent Bonding - whitburnscience
... bonding occurs. In polar covalent bonding the electrons are not shared equally between the different elements. That is to say some elements have a greater affinity for electrons than others. The atom with the greater electron attracting power acquires a very slight negative charge shown δ- while tho ...
... bonding occurs. In polar covalent bonding the electrons are not shared equally between the different elements. That is to say some elements have a greater affinity for electrons than others. The atom with the greater electron attracting power acquires a very slight negative charge shown δ- while tho ...
Equilibrium (Sheet 1)
... La Chatelier's principle states that if a stress such as a change in concentration, pressure or temperature is applied to a system in equilibrium, the equilibrium will shift in a way that tends to undo the effect of the stress. For example: H2O + CO H2 + CO2 + heat. If no stress is introduced into t ...
... La Chatelier's principle states that if a stress such as a change in concentration, pressure or temperature is applied to a system in equilibrium, the equilibrium will shift in a way that tends to undo the effect of the stress. For example: H2O + CO H2 + CO2 + heat. If no stress is introduced into t ...
View Article - Asian Journal of Chemistry
... mmol) was added dropwise in 2 h when the mixture maintained at 100 - 130 ºC heated by oil bath, excess time was prolonged for reaction until the colour of the reaction mixture turned to light yellow, after that the oil bath was removed and ethyl acetate (20 mL) was introduced. After the mixture was ...
... mmol) was added dropwise in 2 h when the mixture maintained at 100 - 130 ºC heated by oil bath, excess time was prolonged for reaction until the colour of the reaction mixture turned to light yellow, after that the oil bath was removed and ethyl acetate (20 mL) was introduced. After the mixture was ...
Problem 5. The Second Law of thermodynamics
... 1. As can be seen from the figure, there are many possible ways to go from point A (1 bar, 298 K) to point B (8 bar, 298 K) using only adiabatic and isobaric segments. The work W is equal to the area under the path. It is clear that W is minimal if we complete the process in two stages: isobaric coo ...
... 1. As can be seen from the figure, there are many possible ways to go from point A (1 bar, 298 K) to point B (8 bar, 298 K) using only adiabatic and isobaric segments. The work W is equal to the area under the path. It is clear that W is minimal if we complete the process in two stages: isobaric coo ...
Recaps and Additional Slides Chem 20B: Reference
... Energy changes with making and breaking bonds, heat Acids & bases Electrochemistry Relation to thermodynamics, energy storage Heat capacity ...
... Energy changes with making and breaking bonds, heat Acids & bases Electrochemistry Relation to thermodynamics, energy storage Heat capacity ...
Problem 5. The Second Law of thermodynamics
... 1. As can be seen from the figure, there are many possible ways to go from point A (1 bar, 298 K) to point B (8 bar, 298 K) using only adiabatic and isobaric segments. The work W is equal to the area under the path. It is clear that W is minimal if we complete the process in two stages: isobaric coo ...
... 1. As can be seen from the figure, there are many possible ways to go from point A (1 bar, 298 K) to point B (8 bar, 298 K) using only adiabatic and isobaric segments. The work W is equal to the area under the path. It is clear that W is minimal if we complete the process in two stages: isobaric coo ...
Study of graphite electrode surface with In and Pt deposits E.M.
... curves. This is due to the fact that catalytic hydrogen release always occurs with the platinum ion reduction (IV). This leads to the process of platinum ions electroreduction overlapping and the simultaneous oxygen release from water, as it occurs at the potentials which are greater than 1 V. In ad ...
... curves. This is due to the fact that catalytic hydrogen release always occurs with the platinum ion reduction (IV). This leads to the process of platinum ions electroreduction overlapping and the simultaneous oxygen release from water, as it occurs at the potentials which are greater than 1 V. In ad ...
Solutions (DOC format, upgraded July 20)
... 1. As can be seen from the figure, there are many possible ways to go from point A (1 bar, 298 K) to point B (8 bar, 298 K) using only adiabatic and isobaric segments. The work W is equal to the area under the path. It is clear that W is minimal if we complete the process in two stages: isobaric coo ...
... 1. As can be seen from the figure, there are many possible ways to go from point A (1 bar, 298 K) to point B (8 bar, 298 K) using only adiabatic and isobaric segments. The work W is equal to the area under the path. It is clear that W is minimal if we complete the process in two stages: isobaric coo ...
Topic 14 - Fertilisers
... Ammonia is a colourless gas which turns moist pH paper blue/purple i.e. it is an alkali. NH3(g) + H2O(l) ...
... Ammonia is a colourless gas which turns moist pH paper blue/purple i.e. it is an alkali. NH3(g) + H2O(l) ...
Multiple-choice questions : 1. The following graph shows the volume
... Each question below consists of two separate statements. Decide whether each of the two statements is true or false; if both are true, then decide whether or not the second statement is a correct explanation of the first statement. Then select one option from A to D according to the following table: ...
... Each question below consists of two separate statements. Decide whether each of the two statements is true or false; if both are true, then decide whether or not the second statement is a correct explanation of the first statement. Then select one option from A to D according to the following table: ...
Energy is the essence of chemistry It determines which reaction can
... • A negative ion is next to a positive ion. The strong attraction between these ions causes a high melting and boiling temperature. Many ionic solids are soluble in water An electrolyte solution. It conducts electricity Many are also sparingly soluble in water Calcium phosphate in bones is very spar ...
... • A negative ion is next to a positive ion. The strong attraction between these ions causes a high melting and boiling temperature. Many ionic solids are soluble in water An electrolyte solution. It conducts electricity Many are also sparingly soluble in water Calcium phosphate in bones is very spar ...
Rapid Microwave Synthesis, Characterization and Reactivity
... parameters of the N and H atoms within both the LT- and HT-Li4NH phases. Simultaneous thermal analysis (thermogravimetric and differential thermal analysis; TG-DTA) was performed using a NETZSCH STA 409PC thermobalance coupled to a HIDEN HPR20 mass spectrometer (MS). Approximately 30 mg of Li4NH was ...
... parameters of the N and H atoms within both the LT- and HT-Li4NH phases. Simultaneous thermal analysis (thermogravimetric and differential thermal analysis; TG-DTA) was performed using a NETZSCH STA 409PC thermobalance coupled to a HIDEN HPR20 mass spectrometer (MS). Approximately 30 mg of Li4NH was ...
Types of Aqueous Reactions
... in particular, are considered to come in two types: strong and weak. This is not what it sounds like! It has nothing to do with how powerful the solutions is. ...
... in particular, are considered to come in two types: strong and weak. This is not what it sounds like! It has nothing to do with how powerful the solutions is. ...
Chemistry Notes for the Whole Year Powerpoint
... electron shell. This means that all atoms, in a Lewis structure, must have eight valence electrons around them (they can be either bonded or lone pair electrons). • Hydrogen and helium are exceptions to the octet rule. There is one more element that is an exception to the octet rule, which one is it ...
... electron shell. This means that all atoms, in a Lewis structure, must have eight valence electrons around them (they can be either bonded or lone pair electrons). • Hydrogen and helium are exceptions to the octet rule. There is one more element that is an exception to the octet rule, which one is it ...
Chem 400 Inorganic Chemistry Laboratory
... π electrons. Two molecules of this anion will react with iron(II) to give ferrocene, the most common member of the class of organometallic compounds referred to as metallocenes. In this centrosymmetric sandwich-type π complex, all carbon atoms are equidistant from the iron atom. The extraordinary st ...
... π electrons. Two molecules of this anion will react with iron(II) to give ferrocene, the most common member of the class of organometallic compounds referred to as metallocenes. In this centrosymmetric sandwich-type π complex, all carbon atoms are equidistant from the iron atom. The extraordinary st ...
Laboratory 3
... In this equation, the (+) symbol indicates that nitrogen reacts with oxygen and the arrow indicates that nitric oxide is formed. The chemical formulas on the left side of the equation are collectively known as the reactants and those on the right side as the products. In this case we have one kind o ...
... In this equation, the (+) symbol indicates that nitrogen reacts with oxygen and the arrow indicates that nitric oxide is formed. The chemical formulas on the left side of the equation are collectively known as the reactants and those on the right side as the products. In this case we have one kind o ...
Electrolysis of water
Electrolysis of water is the decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) due to an electric current being passed through the water.This technique can be used to make hydrogen fuel (hydrogen gas) and breathable oxygen; though currently most industrial methods make hydrogen fuel from natural gas instead.