El Agua
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The document discusses the properties of the water molecule. It describes water's physical states as solid, liquid, and gas. Chemically, water has the formula H2O and its molecules have partial positive and negative charges. Biologically, water is essential for life and makes up 60-90% of living organisms. It acts as a solvent and is involved in many metabolic processes.
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![UNIVERSIDAD CENTRAL DEL ECUADOR
FACULTAD DE FILOSOFÍA, LETRAS Y CIENCIAS DE LA EDUCACIÓN
CARRERA DE PEDAGOGÍA DE LAS CIENCIAS EXPERIMENTALES
QUÍMICA Y BIOLOGÍA
Integrantes:
Chicaiza Wilson
Garrido Aldahir
Reyes Camila
Torres John
Angeles Tulcanaz
CURSO: 1ero “B” FECHA: 16 de junio del 2020
Realizar una ilustración de la molécula de agua y señalar las propiedades físicas,
químicas y biológicas de esta importante biomolécula inorgánica.
MOLÉCULA DEL AGUA
Estado físico: sólida, liquida y gaseosa
Color: incolora
Sabor: insípida
Olor: inodoro
Densidad: 1 g./c.c. a 4°C
Punto de congelación: 0°C
Gráfico 1.Elaboración propia. Molécula del agua [Fotografía]](https://image.slidesharecdn.com/trabajogrupalunidad4elagua-210206045518/85/El-Agua-1-320.jpg)
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- **State of Matter:** Water can exist in three states: solid (ice), liquid (water), and gas (water vapor), depending on temperature and pressure.
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20 ch02chemistry2010
This document provides an overview of key chemistry concepts related to water and its importance for life. It discusses water's unique properties including its ability to form hydrogen bonds, act as a solvent, have lower density as a solid allowing ice to float, store and release heat via its high specific heat and heat of vaporization, and ionize into H+ and OH- ions determining pH. These special properties of water, especially its prevalence as the solvent for life processes and its role in moderating temperatures on Earth, make it uniquely suited to supporting life.
The-Structure-and-Properties-of-Water (1).pptx
these slides include the basic structure of water how they form bonds how they interact and its physical and chemical properties it also include the biochemical importance of water .
Title: Structure and Properties of Water
Introduction:
Water is a vital molecule for all forms of life. Its unique structure and properties are crucial for various biological, chemical, and physical processes. Understanding the molecular structure and the resulting properties of water can provide insight into its essential role in nature and science.
1. Molecular Structure of Water:
Water (H₂O) is composed of two hydrogen atoms covalently bonded to one oxygen atom. The oxygen atom is more electronegative than hydrogen, resulting in a polar covalent bond. This polarity creates a partial negative charge near the oxygen atom and a partial positive charge near the hydrogen atoms.
2. Geometry and Bond Angles:
Water has a bent or V-shaped molecular geometry due to the two lone pairs of electrons on the oxygen atom. The bond angle between the hydrogen-oxygen-hydrogen (H-O-H) atoms is approximately 104.5 degrees. This angle is less than the ideal tetrahedral angle of 109.5 degrees due to the repulsion between the lone pairs of electrons.
3. Hydrogen Bonding:
One of the most significant properties of water is its ability to form hydrogen bonds. Each water molecule can form up to four hydrogen bonds: two through its hydrogen atoms and two through the lone pairs on its oxygen atom. These hydrogen bonds are responsible for many of water's unique properties.
4. High Cohesion and Adhesion:
Cohesion refers to the attraction between water molecules, while adhesion refers to the attraction between water molecules and other surfaces. The hydrogen bonds contribute to water's high cohesion, which is why water has a high surface tension. This allows insects to walk on water and causes water droplets to form. Adhesion helps water to stick to other surfaces, which is important for processes like capillary action in plants.
5. High Specific Heat Capacity:
Water has a high specific heat capacity, meaning it can absorb a lot of heat energy before its temperature increases significantly. This property helps to moderate Earth's climate and allows organisms to maintain stable internal temperatures.
6. High Heat of Vaporization:
Water requires a significant amount of energy to transition from a liquid to a gas due to the strength of hydrogen bonds. This property is crucial for regulating temperature through processes like sweating and transpiration.
7. Density and Ice Formation:
The density of water decreases as it freezes. In liquid water, molecules are closely packed but still moving, whereas in ice, water molecules form a crystalline lattice that is less dense than liquid water. This is why ice floats on water, providing insulation for aquatic life in cold environments.
8. Solvent Properties:
Water is often referred to as the "universal solvent"
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Structure and properties of water and chemical properties of water
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- 1. UNIVERSIDAD CENTRAL DEL ECUADOR FACULTAD DE FILOSOFÍA, LETRAS Y CIENCIAS DE LA EDUCACIÓN CARRERA DE PEDAGOGÍA DE LAS CIENCIAS EXPERIMENTALES QUÍMICA Y BIOLOGÍA Integrantes: Chicaiza Wilson Garrido Aldahir Reyes Camila Torres John Angeles Tulcanaz CURSO: 1ero “B” FECHA: 16 de junio del 2020 Realizar una ilustración de la molécula de agua y señalar las propiedades físicas, químicas y biológicas de esta importante biomolécula inorgánica. MOLÉCULA DEL AGUA Estado físico: sólida, liquida y gaseosa Color: incolora Sabor: insípida Olor: inodoro Densidad: 1 g./c.c. a 4°C Punto de congelación: 0°C Gráfico 1.Elaboración propia. Molécula del agua [Fotografía]
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- 3. gran capacidad calorífica, tiende a expandirse tras ser sometida a temperaturas por debajo de los 4ºC permitiendo que sobresalga a la superficie al encontrarse en forma de hielo, posee una alta tensión superficial siendo elástica tendiendo a unirse y separarse. BIBLIOGRAFÍA ConAgua. (2017, 16 mayo). Las propiedades del agua. Recuperado 13 de julio de 2020, de https://www.iagua.es/noticias/mexico/conagua/17/05/16/propiedades- agua#:~:text=Propiedades%20qu%C3%ADmicas,a%20unirse%20unas%20con%20otras. Facundo González. (2009, 3 septiembre). El Agua - Propiedades Físicas y Químicas - Importancia Biológica [Archivo de vídeo]. Recuperado de https://www.youtube.com/watch?v=U6OwBwcL9A8 Byers, B., Audesirk, T., & Audesirk, G. (2004). Biología: ciencia y naturaleza. México: Pearson Educación.