This document outlines statements from the Cambridge IGCSE Combined Science syllabus about air and water. It describes chemical tests for water, the purification of water supplies through filtration and chlorination, and the typical composition of clean air. It also addresses the increasing proportion of carbon dioxide in the atmosphere, the formation of carbon dioxide through various processes, and the rusting of iron when exposed to air and water.
GCSE Chemistry Revision - Air and Air PollutionKatie B
This is a quick summary of the GCSE Chemistry topic around the atmosphere and air pollution. It includes topics on acid rain, nitrogen oxides, global warming and car pollution. I have used the Letts GCSE in a Week book for most of this presentation.
GCSE Chemistry Revision - Air and Air PollutionKatie B
This is a quick summary of the GCSE Chemistry topic around the atmosphere and air pollution. It includes topics on acid rain, nitrogen oxides, global warming and car pollution. I have used the Letts GCSE in a Week book for most of this presentation.
Oxygen history, evolution, production, industrial uses steel production, rock...rita martin
Oxygen isolated by joseph priestley oxygen comprises 22 per cent of the atmospheric air Oxygen is produced using air separation plants used in various industrial applications steel production, rocket propellants, medicine
This presentation focuses, how carbon dioxide plays dirty role in Ocean Acidification and Global Warming. I have analyzed data and presented it with some real samples collected from Visakhapatnam, India. Thank you!
Oxygen history, evolution, production, industrial uses steel production, rock...rita martin
Oxygen isolated by joseph priestley oxygen comprises 22 per cent of the atmospheric air Oxygen is produced using air separation plants used in various industrial applications steel production, rocket propellants, medicine
This presentation focuses, how carbon dioxide plays dirty role in Ocean Acidification and Global Warming. I have analyzed data and presented it with some real samples collected from Visakhapatnam, India. Thank you!
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Presentation given by Andy Brown from Progressive Energy on "CO2 purity and the EC IMPACTS Project" in the Effects of Impurities Technical Session at the UKCCSRC Biannual Meeting - CCS in the Bigger Picture - held in Cambridge on 2-3 April 2014
Statistical Optimization of Synthetic Soda Ash for Water Softeningijtsrd
Synthesized soda ash was prepared by Solvay process with different molar ratio for application of water softening process. In urban utilization, water supply is very important for safe condition. In this research, Box Behnken experimental design was employed for optimization of soda ash. The maximum yield percent of 19.882 of soda ash was obtained by the reaction salt to ammonium hydroxide to carbon dioxide 1 3 6.8 during the reaction time 90 min. The synthesized soda ash was analyzed by X ray diffraction XRD , Scanning Electron Microscope SEM , Energy Dispersive X ray Fluorescence EDXRF and Fourier Transform Infrared Spectroscopy FTIR . Soda ash obtained from optimum condition was applied in water softening of tap water. According to the experimental results of water softening process, the maximum removal of hardness of water was observed at 3 ml of 10 lime solution with 20 ml of 5 of soda ash solution for 1000 ml of water. After treated the lime soda process, the total hardness of water was reduced to initial condition of 255 ppm to 24 ppm. Su Mon Tun | May Myat Khine | Khin Thidar Cho "Statistical Optimization of Synthetic Soda Ash for Water Softening" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27841.pdf Paper URL: https://www.ijtsrd.com/engineering/chemical-engineering/27841/statistical-optimization-of-synthetic-soda-ash-for-water-softening/su-mon-tun
Absorption of CO2 gas from CO
2/Air mixture into aqueous sodium hydroxide solution has been
achieved using packed column in pilot scale at constant temperature (T) of 25±1℃.The aim of the present work
was to improve the Absorption rate of this process, to find the optimal operation conditions, and to contribute to
the using of this process in the chemical industry. Absorption rate (RA) was measured by using different
operating parameters: gas mixture flow rate (G) of 360 -540 m3/h, carbon dioxide inlet concentration (CCO
2) of
0.1-0.5 vol. %, NaOH solution concentration (CNaOH) of 1-2 M, and liquid holdup in the column (VL) of 0.022-0.028 m3 according to experimental design. The measured RA was in the range of RA = 3.235 – 22.340 k-mol/h.
Computer program (Statgraphics/Experimental Design) was used to estimate the fitted linear model of RA in
terms of (G, CCO2, CNaOH, and VL), and the economic aspects of the process. R -squared of RA model was
91.7659 percent, while the standard error of the estimate shows the standard deviation of the residuals to be
1.7619. The linear model of RA was adequate, the operating parameters were significant except the liquid holdup
was not significant, and the interactions were negligible.
As that known carbon dioxide recorded high level of this last years and as agreed in IPCC, that must take serious steps to prevent it and, carbon capture storage is the best candidate thing that has can be done to this issue.
Separation of calcium carbonate and barium sulphate from a mixed sludge prduc...Timothy Rukuni
South Africa is one of the first countries to implement full-scale mine water reclamation to drinking water quality. Reverse osmosis is already being used on full scale for desalination of mine water. However, with increased recycling of mine water, the result has been the increased generation of sludge. The Council for Scientific and Industrial Research (CSIR) has developed the Alkali-Barium-Carbonate (CSIR-ABC) process that can be used for neutralization and desalination of sulphate-rich effluents while recovering valuable by-products from the mixed sludges produced. A mixture of BaSO4 and CaCO3 sludge is produced as one of the by-products, which preferably needs to be separated into its components prior to thermal treatment. The aim of this study was to separate CaCO3 and BaSO4 from a CaCO3-BaSO4 mixed sludge through dissolution of CaCO3 as Ca(HCO3)2 in contact with CO2. Measured quantities of a simulated CaCO3-BaSO4 mixed sludge from the CSIR-ABC process were fed into a reactor vessel containing deionized water and pressurized CO2 was introduced. The effects of temperature and pressure with time were investigated while monitoring alkalinity, pH and calcium concentration. The findings of this study were: (1) The dissolution rate of CaCO3 was rapid i.e. from 0 to 2000mg/L in the first 20 minutes; (2) Ca(HCO3)2 had a high solubility of about 2 600 mg/L when in contact with CO2 at 1 atm., while BaSO4 was almost completely insoluble; (3) The solubility of Ca(HCO3)2 increased with decreasing temperature and increasing pressure; (4) CaCO3, after conversion to Ca(HCO3)2, was separated from BaSO4 in a CaCO3-BaSO4 mixed sludge; (5) Visual MINTEQ model is a powerful tool that can be used to predict the solubilities of CaCO3 and BaSO4 when contacted with CO2.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
1. 12/04/16
C11 Air and WaterC11 Air and Water
Syllabus statementsSyllabus statements
Statements from Cambridge IGCSE Combined Science syllabus 0653 (for exams in 2016 – 2018)
2. Air & WaterAir & Water
1. Describe a chemical test for water.
2. Describe and explain (in outline) the purification
of the water supply by filtration and chlorination.
3. Describe the composition of clean air as being a
mixture of 78% nitrogen, 21% oxygen and small
quantities of noble gases, water vapour and carbon
dioxide.
3. Air & WaterAir & Water
4. Explain why the proportion of carbon dioxide in
the atmosphere is increasing, and why this is
important.
5. Describe the formation of carbon dioxide:
•as a product of complete combustion of carbon-
containing substances;
•as a product of respiration;
•as a product of the reaction between an acid and
a carbonate
•as a product of thermal decomposition.
4. Air & WaterAir & Water
6. Describe the rusting of iron in terms of a
reaction involving air and water, and simple
methods of rust prevention, including paint and
other coatings to exclude oxygen.
