Heating gases practical
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This document describes methods for identifying cations and anions in an unknown ionic salt, including using sodium hydroxide and ammonia to observe color changes of cation precipitates, and using hydrochloric acid, silver nitrate, and barium chloride to observe color and gases produced from anion precipitates. It also discusses identifying salts based on appearance, color, solubility, and observing color changes and gases produced from heating the unknown salt. The sample salt is identified as copper(II) carbonate based on its dark green color, insolubility in water, producing a light blue precipitate in sodium hydroxide, and giving a chalky limewater gas and black residue when heated.
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Ppt1 Introduction To Qa & Tests For Gases
The document discusses qualitative analysis, which is a process chemists use to identify unknown substances. It involves performing chemical tests to determine the cations and anions present, allowing identification of the substance. Common tests include observing the appearance of solids and solutions, determining solubility, observing gases produced from heating or adding acids/alkalis. Gases can be identified using tests like their reaction with litmus, ability to relight a glowing splint, or forming precipitates with reagents. The goal is to perform experiments and make inferences to identify an unknown salt or mixture.
Acids and bases
1. The document discusses acids and bases, including their definitions and properties.
2. An acid is defined as a proton donor, donating hydrogen ions (H+) in water. A base is a proton acceptor, accepting hydrogen ions.
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This document outlines the procedures and observations for analyzing an unknown salt sample. It describes preliminary examinations to identify possible cations present. It then details systematic analysis of anions using acid and base tests. Specific anions like carbonates, chlorides, acetates and others are tested for. The document concludes by describing analysis of cation groups through precipitation reactions and tests, identifying possibilities like ammonium, lead, copper, aluminum, zinc, barium/strontium/calcium, and magnesium. The goal is to determine the identities of the anions and cations present in the unknown salt.
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This document provides information on common cation and anion tests in chemistry. It lists several cations (aluminum, ammonium, calcium, copper, iron, zinc, lead) and their reactions when aqueous sodium hydroxide or ammonia is added. Precipitates formed are identified. It also lists several anions (carbonate, chloride, iodide, nitrate, sulfate) and their confirmatory chemical tests involving reactions like the formation of gases, precipitates with silver or barium salts, or color changes. The document serves as a reference for students to identify common metal cations and inorganic anions through characteristic chemical reactions.
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The document discusses qualitative inorganic analysis of anions, specifically focusing on carbonates/bicarbonates and sulfur-containing anions. It describes the general characteristics, properties, reactions and tests to identify these anions. Carbonates and bicarbonates are identified through reactions with acids that produce carbon dioxide gas. Sulfur-containing anions like sulfides, sulfites and thiosulfates can be identified through reactions that produce hydrogen sulfide gas, sulfur dioxide gas or sulfur precipitates.
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Ions cations and anions
Ions are atoms that have gained or lost electrons, giving them an electrical charge. Atoms that lose electrons become positively charged cations, while atoms that gain electrons become negatively charged anions. The number of protons and neutrons remain the same in an ion, only the number of electrons changes. Ionic bonding occurs through the transfer of electrons from one atom to another, while covalent bonding involves the sharing of electron pairs between two atoms. Sodium chloride is an example of ionic bonding through electron transfer, while an oxygen molecule is held together by covalent bonding from shared electron pairs.
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This document provides information on common cation and anion tests in chemistry. It lists several cations (aluminum, ammonium, calcium, copper, iron, zinc, lead) and their reactions when aqueous sodium hydroxide or ammonia is added. Precipitates formed are identified. It also lists several anions (carbonate, chloride, iodide, nitrate, sulfate) and their confirmatory chemical tests involving reactions like the formation of gases, precipitates with silver or barium salts, or color changes. The document serves as a reference for students to identify common metal cations and inorganic anions through characteristic chemical reactions.
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→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
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[To download this presentation, visit:
https://www.oeconsulting.com.sg/training-presentations]
This presentation is a curated compilation of PowerPoint diagrams and templates designed to illustrate 20 different digital transformation frameworks and models. These frameworks are based on recent industry trends and best practices, ensuring that the content remains relevant and up-to-date.
Key highlights include Microsoft's Digital Transformation Framework, which focuses on driving innovation and efficiency, and McKinsey's Ten Guiding Principles, which provide strategic insights for successful digital transformation. Additionally, Forrester's framework emphasizes enhancing customer experiences and modernizing IT infrastructure, while IDC's MaturityScape helps assess and develop organizational digital maturity. MIT's framework explores cutting-edge strategies for achieving digital success.
These materials are perfect for enhancing your business or classroom presentations, offering visual aids to supplement your insights. Please note that while comprehensive, these slides are intended as supplementary resources and may not be complete for standalone instructional purposes.
Frameworks/Models included:
Microsoft’s Digital Transformation Framework
McKinsey’s Ten Guiding Principles of Digital Transformation
Forrester’s Digital Transformation Framework
IDC’s Digital Transformation MaturityScape
MIT’s Digital Transformation Framework
Gartner’s Digital Transformation Framework
Accenture’s Digital Strategy & Enterprise Frameworks
Deloitte’s Digital Industrial Transformation Framework
Capgemini’s Digital Transformation Framework
PwC’s Digital Transformation Framework
Cisco’s Digital Transformation Framework
Cognizant’s Digital Transformation Framework
DXC Technology’s Digital Transformation Framework
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Business Model Canvas
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How to Implement a Real Estate CRM Software
To implement a CRM for real estate, set clear goals, choose a CRM with key real estate features, and customize it to your needs. Migrate your data, train your team, and use automation to save time. Monitor performance, ensure data security, and use the CRM to enhance marketing. Regularly check its effectiveness to improve your business.
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Creative Web Design Company in Singapore
At Techbox Square, in Singapore, we're not just creative web designers and developers, we're the driving force behind your brand identity. Contact us today.
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Understanding User Needs and Satisfying Them
https://www.productmanagementtoday.com/frs/26903918/understanding-user-needs-and-satisfying-them
We know we want to create products which our customers find to be valuable. Whether we label it as customer-centric or product-led depends on how long we've been doing product management. There are three challenges we face when doing this. The obvious challenge is figuring out what our users need; the non-obvious challenges are in creating a shared understanding of those needs and in sensing if what we're doing is meeting those needs.
In this webinar, we won't focus on the research methods for discovering user-needs. We will focus on synthesis of the needs we discover, communication and alignment tools, and how we operationalize addressing those needs.
Industry expert Scott Sehlhorst will:
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• Present the Onion Diagram, a tool for contextualizing task-level goals
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Heating gases practical
- 1. Identifying the Cations and Anions in an Ionic salt Cations (p 153; 27) Use aq NaOH and aq. NH3 observe the colour differences of the precipitates obtained Anions (p. 156; 29-31) Use dil HCl, aq AgNO3, aq BaCl or other types of solutions to identify the anions by observing the - colour of precipitate - gases produced
- 2. Other ways to identify the salt Appearance & Colour of salt (p 17-19) Different ionic salt appear differently For e.g, Group 1 salts usually appear colourless While a fine green powder usually means it is copper(II) carbonate It’s solubility also indicates possible identity
- 3. NOW… Using heat to identify …. Observe Test the gas produced The colour of the salt before it is heated the colour of the residue after heating
- 4. Identify this salt Dark green powder does not dissolve in water gives a light blue ppt in XS aq NaOH when heated, gas turns limewater chalky and colour of residue is black What is it?