(aq) NH3+ + H+ + Cl- →NH4+ + Cl- NH3+ + H+ → NH4+ H+ + OH- → H2O (l) ∆H= -54.0 kJ/mol NH4++ OH- → NH3+ + H2O (l) (x-1) ∆H=-4.09 kJ/mol (x-1) -54.0+4.09=-49.9 NH3+ + H+ → NH4+ =- 49.9 kJ /mol (-49.9- -26.2)/-49.9 x 100 =47.3% Lab Questions: Pre: 1. The change in thermal content in a reaction 2. The amount of energy needed to change one gram of a substance 1 degree C 3. (50 mL)(1.02 g/mL)(4.18 J/g C)(25.3-21.4) = 830 J 4. 830J+8.20J/g C(25.3-21.4)= 860J 5. .25L(.6mol/1L)+
Premium Temperature Chemical reaction Celsius
Solvent/Water Trap Diagram Rodney Atwaters Halle Bair May 28‚ 2013 Chemistry 36100 Introduction The purpose of this lab was to produce benzoic acid by mixing sodium benzoate with hydrochloric acid. The Hydrochloric acid used in the experiment was a stock solution made by mixing HCl Acid and deionized water. HCl acid‚ historically called‚ muriatic acid or spirits of salt‚ hydrochloric acid is produced from sulfuric acid and common salt‚ NaCl (Princeton.edu). Since the early 1900 ’s‚ sodium
Premium Hydrochloric acid Chlorine Chemistry
Coulomb’s Law Purpose: The purpose of this lab was to demonstrate that the force between two stationary charges is directly proportional to the product of the charges and inversely to the square of the distance between them. Coulomb’s law tells us that the force between two charges depends (1) linearly on the strength of each charge‚ and (2) inversely on the square of the distance between them. Mathematically we would write this as . Procedures Part1 Begin by removing the right side
Premium Electric charge
Krotec; Honors Bio Period 4 Photosynthesis Lab Report I. Introduction The photosynthesis lab is designed to quantify photosynthesis‚ enabling a number of variables to be tested for their effects on photosynthetic rate. The production of oxygen‚ is used as an indirect measure of photosynthetic activity.The lab allows the examination of the effects of different wavelengths of light on photosynthetic activity. The other aspect of the lab includes Paper chromatography‚ which is
Premium Yellow Red RGB color model
The moving phase is either a gas or a liquid and the stationary phase is usually a solid. The mixture to be separated is combined with the mobile phase. As the mobile phase "solution" flows over the stationary phase‚ the components of the mixture continuously equilibrate between the phases‚ based on their particular affinity for each phase. A higher attraction for the mobile phase leads to a higher concentration of a
Premium Chemistry Distillation Food coloring
Copper Cycle Lab The purpose of the lab is to discover what happens when someone executes a series of procedures‚ beginning with copper metal. What is done | What is observed | 1. Started with copper‚ Cu (s). | reddish‚ brownish‚ orange-ish‚ powder-like | 2. Added nitric acid‚ HNO3 (aq). | acid turns blue and smells like chlorine. | 3. Added water‚ H2O (l). | stayed the same | 4. Added sodium hydroxide‚ NaOH (aq). | changed consistency‚ gel-like | 5. Heated the mixture | becomes darker
Premium Sulfuric acid Copper Zinc
The Separation Story. August 31‚ 1939. The sun was setting in the west as Margaret and I skipped home from our self-defense class; Margaret asked if we could stop. Betty‚ can we please stop and play on the playground?" Margaret begged for a quote. "No‚ Margaret‚ Mother wants us home before dark‚" I replied. "But we’re just kids; we’re 12 years old and don’t have much of our childhood left. With all our training and self-defense‚ we don’t have much time to play and be kids." Margaret spoke to the
Premium
AP Lab #5 Plant Pigments/Photosynthesis I. Identifying the Effects of Different Variables of Light and Carbon Dioxide on the Rate of Photosynthesis and Observing the Separation of Pigments Through Chromatography II. Introduction Plants have a variety of pigments‚ all of which absorb a different color of light. The three main pigments are chlorophyll a‚ chlorophyll b and carotenoids. Chlorophyll a is the primary plant pigment that absorbs red and blue light‚ which ultimately appears green to the human eye
Premium Photosynthesis Light Plant
the series of offenses could be something of less importance like leaving dirty clothes on the floor and snoring‚ it could also be something traumatic like infidelity‚ debts‚ and abandonment. According to Zachary Hamilton‚ a Marriage and Relationship Coach at Better Path‚ 9o percent of marital conflicts are signs of the unwillingness to forgive themselves‚ the erring partner or some person that had made a deep impact on their life negatively. The remaining ten percent could be related to chemistry
Premium Marriage Suicide Psychology
October 1‚ 2013 Chemical Reactions of Copper Objective The objective of this lab is to convert copper (Cu0) “in a series of reactions to various compound containing copper as the Cu2+ species” (CHM111 Laboratory Manual) in order to prove the Law of the Conservation of Mass. Introduction In this experiment‚ we took a look at how copper (Cu0) reacts with different substances to get an end result where it is transformed back to its original state. There were five different reactions that involved
Premium Chemistry