further reaction: H2CO3 (aq) [pic] H2O (l) + CO2 (g) Procedure Outline This experiment will involve several steps. The first step will involve a simple reaction to determine the concentration of the NaOH that will be used in this experiment using a solid acid standard. Using the standardized NaOH‚ the next step of the lab will involve determining the concentration of the HCl. Once we have the concentration of the standardized HCl‚ we will conclude the lab by determining the amount of acid that
Premium Hydrochloric acid PH
calcium hydroxide‚ Ca(OH)2. Materials and Equipment Calcium nitrate‚ Ca(NO3)2‚ 0.10 M Sodium hydroxide‚ NaOH‚ 0.10 M (2) 96-well micro-wellplates 50-mL beaker Small dropper bottles for Ca(NO3)2‚ NaOH‚ and H2O (2) disposable pipets for mixing Note Hold the droppers vertically when dispensing the drops. Discard the first drop as it may contain an air bubble. Procedure Part A Ca(NO3)2 varies‚ NaOH held constant Arrange a micro-wellplate so that you have 12 wells up and down. Put 5 drops of 0.10 M
Premium Solubility Sodium hydroxide Chemistry
lead to the original reactions. The following are the reactions at the lab; 1) NaOH ( s) NaOH (aq) 2) NaOH (aq) + HCl (aq) NaCl (aq) + H2O (l) 3) NaOH (s) + HCl (aq) NaCl (aq) + H2O (l) As explained before‚ Hess’s Law states that the enthalpy change of reaction three (ΔH3) should be equal to the sum of the enthalpy changes of the first two reactions ( ΔH1 + ΔH2 ). As seen at the equations‚ the solid NaOH dissociates into its ions‚ after that it is neutralized by HCl. DATA COLLECTION
Premium Thermodynamics Enthalpy Heat
Table: Compound Molecular Weight (g/mol) Density (g/mL) Boiling Point (°C) Melting Point (°C) Amount used (g‚ mL‚ etc.) Acetophenone 120.16 1.03 201.7 19.7 1 ml 95% ethanol 46.07 0.8 79 -114 50% NaOH 40.2 1.53 140 12 Anisaldehyde 136.16 1.12 248 -1 1 ml Structures: Acetophenone: 95% ethanol: 50% NaOH: Anisaldehyde: MSDS: Acetophenone: Very hazardous in case of eye contact (irritant). Hazardous in case of skin contact (irritant). Slightly hazardous in case of ingestion‚ of inhalation. 95%
Premium Chemistry Molecule Chemical reaction
phthalate is a weak acid that reacts with NaOH compared to the secondary standard‚ sodium hydroxide that is basic and hygroscopic‚ meaning it absorbs moisture from the air. It was necessary to standardize NaOH solution because the compound is never a 100% NaOH since it absorbs a lot of moisture from the air. The processes used to determine the molar concentration of sodium hydroxide was by: 1) using the volume of NaOH at the end point and 2) by using the volume of NaOH at the equivalence point. The pH
Premium Sodium hydroxide
acid-strong base titrations Introduction Acid-base titrations are based on the neutralization reaction between the analyte and an acidic or basic titrant. When an acid and a base are present in a stoichiometric amount e.g. 1 mole HCl added to 1 mole NaOH‚ this means that the equivalent point has been reached in an acid-base system. The end point of an acid-base titration can be detected by the use of a pH indicator‚ a pH meter‚ or a conductance meter. The use of a pH meter to quantitatively determine
Premium PH Titration
mol)(17.04 g /1 mol) • 15 kg N2 (1/1)(1/28.02)(2/1)(17.04/1) What is the concentration of an NaOH solution when 25 mL of water is added to 2 g of NaOH? • (Na = 22.99 g/mol); (O = 16.00 g/mol); (H = 1.01 g/mol) = 2.0 M Solution Stoichiometry What is the molarity of a HClO3 solution if 45.36 mL is needed to completely react with 51.53 mL of a 0.0945 M NaOH solution. HClO3 + NaOH → H2O + NaClO3 51.53 mL NaOH (1 L (.0945 molNaOH (1
Free Acid Chemistry Sodium chloride
in bag 2"x 3"‚ 1 Magnesium Oxide powder - 0.5 g‚ 2 pipet‚ empty short stem - labeled "HCL‚" & "NaOH"‚ 1 Sodium Chloride in vial – full‚ 1 Sodium Hydroxide‚ 6 M - 4 mL in dropper bottle‚1 Zinc‚ Mossy - 6-8 Pieces‚ Bag 2"x 3" Procedure: 1. Half-fill one well of a 24-well plate with 6 M HCl and half-fill a second well of the 24-well plate with 6 M NaOH. Suck up these chemicals into their labeled pipets for later use. 2. Perform the following steps on
Premium
substance to one side of the equation‚ shifts the equilibrium to the opposite side. This same effect applies to the indicators in a solution. In the case of NaOH and Malic acid titration; before the malic acid was added to the solution‚ all that remained was a solution of NaOH and Thymol blue‚ at this stage the thymol blue was Mostly ionized within NaOH (The Hydroxide ion reacts with the Thymol Blue)‚ thus giving off a blue color‚ as there is an abundance of Hydroxide anions and not enough Hydrogen cations
Premium Acid Base PH indicator
conducted in a container‚ which was divided in half with a pH substrate side tested against a control side. The movements and actions of the test slaters were recorded at constant time intervals. The results observed illustrate the preference of a basic NaOH in comparison to the acidic HCI solution. The explanation of this result can be referred against previous studies‚ which illustrate mechanisms such as conglobation and thigmokinesis employed by slaters in order to create a stable environment whilst
Premium Taxis Woodlouse PH