nh4cl most likely ○ i agree with nh4cl ○ Reasoning? ○ if it was nh4no3 it would not form precipitate when you add agno3 im pretty sure ○ What else can we say about NH4Cl? ○ was there bubbles with hcl? if so‚ then it can be co3 2 (carbonate) ● Unknown 6 ● KOH ○ basic ○ flame test ○ did not react with naoh therefore it can contain oh‚ i guess ● Unknown 7 ● HCl ○ ○ ○ ○ ● Unknown 8 ● Ca(OH)2 ○ was soluble with naoh therefore
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soluble in water than the corresponding alkali metal salts. Some are even so insoluble that they resist weathering and leahcing action in rainwater. Its common oxidation states is 2. Magnesium forms many compounds. The oxide‚ hydroxide‚ chloride‚ carbonate‚ and sulfate are commercially important. They are used in ceramics‚ cosmetics‚ fertilizers‚ insulation‚ leather tanning‚ and textile processing. Common Uses . The coating protects the metal‚ particularly magnesium‚ from further oxidation
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lettuce | yellow | presence of starch | | chicken | black | no presence of starch | Changes Questions Use what you learned in this lab to answer the following questions: A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? B. You know what color phenolphthalein and bromothymol blue turn when testing an acid or a base. Use the empty pipet in the Auxiliary Supplies Bag to
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-120-180 mg/l Very hard 180 + mg/l It is important to study the hardness of water because of the problems it can cause when left untreated. Hard water can cause “scale‚” or build-up in plumbing fixtures and water heaters.3 Scale occurs when calcium carbonate‚ CaCO3 ‚ is deposited as calcite crystals on the inner surfaces of pipes‚ and evaporator surfaces. This occurs when water with a high hardness value is evaporated or heated. This buildup can block pipes‚ make heat transfers in boilers inefficient
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formulation P6 exhibited the highest lag time (219 s) (Table 5.4) (Figure 5.1 and 5.2). The decrease in the buoyancy lag time of a formulation P1 can be attributed to the availability of an increase amount of carbon dioxide with concentration of calcium carbonate which was entrapped in the formed gel to give rapid buoyancy. Irrespective of formulation variables‚ buoyancy duration was >12
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are sodium salts that partially ionize in water and if you saturate the solution with salt‚ the salt will remain dissolved because it is more soluble and the soap will precipitate out because of the hydrocarbon chains. Experiment 31: 2. Sodium carbonate is used because it is basic and is able to deprotonate the compound in the mixture‚ but it is not so reactive as a base like NaOH that it will create a basic mixture. Excess sodium bicarbonate is also relative harmless 4. Sodium methyl sulfate
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Edward Dickson CHE101 DS-01 Experiment Date 7/21/2013 Report Submitted 7/21/2013 Title: Experiment #8: Ionic Reactions Purpose: In this lab we will work with aqueous solutions of ionic substances and determine if they are soluble. If the solution appears milky than it is known as a precipitate reaction‚ meaning it is soluble‚ and that the ions separated and became surrounded by water. Precipitates in this experiment are electrically uncharged. To identify which compounds are
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K2CO3: 9.25 g x 1 mol / 138.2 g = 0.07 mol CaCO3 CaCl2 is limiting reagent Theoretical yield = 0.06 mol CaCO3 x 100 = 6.40 g CaCO3 Percent yield = 6.15 g / 6.40 g = 96.1 % Post-Lab Questions 1. In this first trial‚ I saw that there was less calcium carbonate that was produced. 2. The results were expected because less reactant was used in the first trial compared to the second trial. 3. Reducing the amount of CaCl2 used would still keep this substance as the limiting reagent and therefore the
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booms heard at ground level are the result of the rapid release of energy into the air‚ causing the air to expand faster than the speed of sound. This produces a shock wave‚ a sonic boom. The colors are produced by heating metal salts‚ such as calcium chloride or sodium nitrate‚ that emit characteristic colors. The atoms of each element absorb energy and release it as light of specific colors. The energy absorbed by an atom rearranges its electrons from their lowest-energy state‚ called the ground
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protected by a hard shell. Garden snail also known as Helix aspersa. The body of the snail is long‚ moist and slimy. It has a shell to protect its soft body. The shell of a snail is made up of calcium carbonate. The shell becomes very strong and remains that way as long as the snail consumes a diet that is full of calcium. When the snail is disturbed‚ it simply withdraws or pulls itself back into its shell. The snail also retreats into its shell and seals the entrance in dry weather to protect its body from
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