Al+3NaNO3 7. 2Ca+ + 2NaOH Ca(OH)2 + 2NaNO3 8. 2 NaOH + Cu Cu2 + 2OH 9. Zn2+ 2NaOH Zn(OH)2+2Na Identify the cations that precipitate with hydrochloric acid and dissolve in the presence of ammonia -Iron Identify the cations that precipitate with hydrochloric acid and do not redissolve in the presence of ammonia -SILVER AND LEAD Identify the cations that precipitate upon addition of two or three drops of sodium hydroxide but re-dissolve upon addition of excess sodium hydroxide. -Aluminum‚ zinc
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also be weakly bonded or more strongly as a ligand to form a complex ion‚ and these can also present in solid ‘hydrated’ salts of crystallization. For example‚ copper (II) nitrate (Cu(NO3)2∙3H2O) The metal complexes that contain at least one ammonia (NH3) ligand are called metal ammine complexes. Metal acetylacetonates are coordination complexes derived from the acetylacetonate anion(acac) and metal ions. The coordination number of a complex ion is the number of coordinate bonds being formed
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+ Kd Complex Ion Equilibria −8 3 + 3 2 (x)(2x)2 Kd = (0.010 − x) • How many moles of ammonia must be added to 2.00 L of water so that it will just dissolve 0.010 mole of silver chloride‚ AgCl? = 6.3 ×10−8 – What is the stoichiometric amount of NH3 needed to form Ag(NH3)2+ ? • STOICHIOMETRIC amount 4x3 = 6.3×10−10 – What is the equilibrium NH3 concentration needed to maintain the silver-ammonia complex? x3 = 1.6×10−10 [ ] x = 5.4 ×10−4 M = Ag+ • EQUILIBRIUM amount 5 7 Complex Ion
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Ammonia and Hydrochloric Acid Lab Chemistry 1 Abstract The straw should be cut shorter to 8 cm in order to make the solid ring appear in the center of the straw. We achieved our goal‚ cutting the straw caused the gases to not have to go as far‚ and meet in the middle. Background The particles in a gas are very loose and tend to move around a lot very quickly. The particles in a solid are very compact and vibrate but don’t really move very much. The particles in a liquid however are more
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← Understand the manufacture of sulphuric acid. ← Synthesise the manufacture of ammonia and its salts. ← Understand alloys. ← Evaluate the uses of synthetic polymer. ← Apply the uses of glass and ceramics. ← Evaluate the uses of composite materials. ← Appreciate various synthetic industrial materiala. (H4SO4) ← USES OF SULPHURIC ACID 1. Sulphuric acid is used to produce chemical fertilizer such as ammonium sulphate and potassium sulphate‚ which are highly soluble in water
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or symbiotic bacteria. These bacteria have the nitrogenase enzyme that combines gaseous nitrogen with hydrogen to produce ammonia‚ which is then further converted by the bacteria to make their own organic compounds. Some nitrogen fixing bacteria‚ such as Rhizobium‚ live in the root nodules of legumes (such as peas or beans). Here they form a mutualisticrelationship with the plant‚ producing ammonia in exchange for carbohydrates. Nutrient-poor soils can be planted with legumes to enrich them with nitrogen. A
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Report Introduction Mummification is an ancient Egyptian method which is a natural or deliberate process intended to dehydrate the body to preserve it. They done this because they believed that if a body was left to rot then it would destroy their soul‚ so they believed that the body needed to be intact to serve as host for the soul. So they preserved bodies so they could use them in the afterlife‚ where the Egyptians believed they would make a journey to another life. To start to mummify a body
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The Effect of Molecular Weight and Time on the Diffusion Rate of Potassium Permanganate‚ Potassium Dichromate‚ and Methylene Blue.1 Arantxa Alex Carpio Group 1 Sec. X – 4L March 24‚ 2015 ABSTRACT The effect of molecular weight and time on the rate of diffusion was determined using the agar-water gel test. A petri dish of agar-water gel with three wells was prepared and a prepared solution of each substance was dropped on each well; one with potassium permanganate (KMnO4)‚
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unwanted products of metabolism and of substances present in excess within the organism. Animals excrete nitrogenous waste products such as ammonia‚ uric acid or urea. These or similar products to that produced by the deamination of any excess protein that has been eaten as nitrogenous compounds are formed in metabolism of proteins and nucleic acids. Ammonia is lost by diffusion from small aquatic organisms but more complex animals such as mammals rely on kidneys to filter wastes out of the blood
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be available to slip under the well as the student observes the changes that are occurring. As each reaction occurs‚ record the well number and observations. 1. Sodium Bicarbonate + Hydrochloric Acid 2. Hydrochloric Acid + Bromothymol blue 3. Ammonia + 1 drop Bromothymol blue 4. Hydrochloric acid + blue dye 5. Blue dye + Sodium Hypochlorite. Observe & add 1 drop of hydrochloric acid. 6. Potassium iodide + Lead Nitrate. A precipitate should form. 7. Sodium hydroxide + phenolphthalein. a.
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