Unit 18 B Study Guide 1. Find the solubility (in mol/L) of lead(II) chloride (PbCl2) at 25oC. Ksp = 1.62e–5. A) 1.59e–2 B) 2.53e–2 C) 6.64e–17 D) 2.01e–3 E) 2.01e–2 2. The two salts AgX and AgY have very similar solubilities in water. It is known that the salt AgX is much more soluble in acid than is AgY. What can be said about the relative strengths of the acids HX and HY? A) Nothing. B) HY is stronger than HX. C) HX is stronger than HY. D) The acids have equal strengths. E)
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to receive more electrons in the outer shell to be stable. 1.2 Ionic bonding occurs between metal and non-metal atoms and consists in gaining and losing electrons to reach electron stability. Metal atoms lose electrons (negative charge) becoming ions‚ positively charged. Non-metal atoms gain electrons to achieve electron stability. Sodium has one valence electron in its outer shell‚ so it needs to give that electron away in order to achieve stability. Vice versa‚ Chlorine atom has 7 valence electrons
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VIHS/ Department of Chemistry Chemistry Revision Unit II (Edexcel) (01) a) When lithium nitrate and sodium nitrate are heated separately‚ both decompose giving oxygen gas as one of the products. (i) Which of these two nitrates would decompose at the lower temperature? .........................................................………………………………………….................... (ii) Give the name of any other product formed when sodium nitrate is heated. .....................................................
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Valuable Experience Gained During the Training Period The valuable experience that I gained during the training is when we are in the furnace of the boiler where the combustion takes place. The furnace is a internal parts of the boiler so we are taking the advantage to see what’s inside the boiler. We saw the generating tubes‚ bunker fuel injector‚ grates that we need to fix because of mis-alignment of the grates base. Grate is use for de ashing to avoid clogging up of the boiler. The second
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TMA04 Question 1 In TMA02 I asked my tutor to give me specific feedback on the learning outcome Ky1. I was advised that I should take a little more care with significant figures and scientific notation. There has not been much emphasis on significant figures and scientific notation in TMA04. However I have taken the advice given by my tutor and broadened it to include attention to detail in all areas dealing with numbers within this assignment especially in questions 2 ai) 2ci) & 3bi). Question
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RESULTS AND DISCUSSION In the Iron (II) - Silver Ions System the reaction had a balance chemical equation of Fe2+ + Ag+ Fe3+ + Ag(S). The process if centrifugation is used in this part of the experiment to be able to separate the supernatant and the precipitate. And the supernatant will be used to test for the presence of Fe2+‚ Ag+ and Fe3+ in the solution. Results showed that there is a positive presence for FE 2+‚ Fe3+ and Ag+ because of the visible change of color of Prussian blue precipitate
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dissolve in water because the substance is nonpolar and will not attract to the water molecules. 4. The Ph scale is a tool in science used solubility of a substance. An acid is a substance that will form hydrogen ions when dissolved in water. Bases are substance that will produce hydroxide ions when dissolved. The number of the Ph scale represent how strong an acid is or . Examples of acids are stomach acids and lemo juice. Examples of bases are lye and soap. 5. F 6. F 7. f
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Experiment # 8 Qualitative Analysis of Cations Objectives Part I: Separate a mixture of known cations: Pb2+‚ Fe3+‚ Al3+‚ Cu2+‚ and Ca2+ into individual ions. Perform a series of tests to become familiar with reactions characteristic of each cation. Part II: Separate and identify individual cations in an unknown solution containing a mixture of up to five cations. Use information gathered in part I to identify the cations. Introduction Qualitative analysis is a general name for the process
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Qualitative Analysis of Ion Exchange Capacity 1. Sand‚ Sand and humus‚ Collected sample‚ Sand and clay 2. Crystal Violet and Eosin Y have different charges and soils with a higher capacity hold more colors. 3. The more absorptive samples (sand and humus) have a negative charge while the less absorptive samples have a positive charge. 4. It’s important so the plants have correct nutrients to enable proper growth. 5. I would add clay Activity 3 – Analysis of Free Ions 1. Soil becomes
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From the experiment‚ it was determined that Sodium chloride had a crystalline structure‚ even after being broken into smaller pieces with a hammer. Even though there was two different types of Sodium chloride‚ coarse and fine‚ they still had a symmetrical‚ three-dimensional shape. All ionic compounds have this structure. It was also found that Sodium chloride had a high melting point and sugar had a low melting point. This is because Sodium chloride is ionic and the bonds holding it together take
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