The gelling agent used in the preparation of the gel was gelatine. What other materials can be used to gel aqueous solutions?
Gel is a colloidal solution in which solid is dispersed in liquid.
Gel conatin cross-linking due to which they can't flow and this property can be achieved by adding a polymer or substance which cross linked them. Such substance are : gelatin, carrageenan, carboxymethyl cellulose, agar, aliginate, guar gum are some examples.
Please give feedback!
The gelling agent used in the preparation of the gel was gelatine. What other materials can...
1. Draw the structure of EDTA. 2. Distinguish between a complexing agent and a chelating agent. 3. Explain why an anion exchange resin can be used to separate a mixture of cations such as Co(ll) and Ni(l). Name and write the formula for a species that contains Coll) (in the experiment you are performing) that imparts the following colors when the species in present in aqueous solutions. a. blue or blue-green b. pink 5. The equilibrium constant for the following...
4-Match the materials control form in the left column with the person responsible for its preparation in the right column. (A selection may be used more than once.) a. Purchase requisition 1. Production department supervisor b. Purchase order 2. Storeroom keeper c. Receiving report 3. Purchasing agent d. Debit-credit memo 4. Receiving clerk e. Materials requisition 5. Accountant
What is the purpose of gel electrophoresis? How is size related to movement through a gel? What is a DNA ladder? Why is it important in gel electrophoresis and how is it used? (note: a ladder is also called a “standard”) What are two indications one can look for to be certain the gel electrophoresis is occurring? What are two strategies to improve the resolution of DNA bands?
2. Can Na2SO4 be used as a precipitating agent to separate a mixture of Fe2+ and Ca2+? Explain. 3. Can ammonia be used as a precipitating agent to separate a mixture of Al3+ and Cu2+? Explain. Describe a possible step-by-step procedure for separating a mixture of Ca2+, Al3+, Fe3+, and Zn2+. Be clear about what precipitating agent you will add in what order, and what will get filtered out at each step. At the end, you should have each of...
Gel electrophoresis can be used to separate molecules by select all that apply a.length. b.size. c.charge. d.weight. e.# of atoms.
72. Hydrogen peroxide is a very common oxidizing agent. It has been used as an oxidizer for rocket engines, it is a readily available antiseptic for home use and we have used it several times in the general chemistry lab. Below is some thermodynamic data for hydrogen peroxide xide at 25 C H (kJ/mol AG (k.J/mol Chemical Thermodvnamics of hydrogen 188 266 H20:1) H2(g) 02(g) H:0:(1) 20H(g H2O2(g) → 20H(g) H202(g) HO:(g) +H(g) H2O2(l) H2O(l)+%O2(g) 120 188 174 332 365...
Gel electrophoresis. Polypeptides can be separated by electrophoresis according to their relative content of acidic and basic residues. The isoelectric point (pI) of a polypeptide is the pH at which its net charge is zero. (See Fig 3.11 of your textbook). A) At physiological pH (= 7.4), what is the net charge on the tripeptide Asp-Arg-Glu-His? B) Calculate the pI of this tetrapeptide. [Hint: Using the pK, values in Table 2.1 and the Henderson-Hasselbalch equation, determine the pH when the...
Permanganate, MnO4–, can act as an oxidizing agent in both acidic and basic aqueous solutions. Balance each of the following reactions by the half–reaction method, showing all steps in the balancing process. i. MnO4– + Al ––> MnO2 + Al(OH)4– in aqueous base ii. MnO4– + CH3COOH ––> Mn+2 + CO2 in aqueous acid
You are responsible for the manufacturing budget preparation. What other forecast or budget/s affects the raw materials budget and in what way? How would a growth in the sales forecast affect the raw materials budget? What will this growth mean to the budgeted statement of financial performance and what should be considered in terms of the capacity of the production department and costs across all departments? 200–220 words
1) Hypochlorite ion, used as a chlorinating agent in swimming pools, can decompose exothermically, in rare occasions even causing fires. The principal decomposition mechanism in aqueous solution is believed to be 2 OCl (aq) + CO2 (aq) + Cl(aq) ki, k-1 OCl(aq) + ClO2 (aq) → ClO3(aq) + Cl(aq) kz a) (3pts) What is the net overall reaction? b) (4pts) Apply the steady state approximation to derive an expression for d[ClO3-)/dt in terms of the concentrations of the reactants and...