exercises for present simple and present continuous in English
Recently, power quality has become an important subject and area of research because of its increasing awareness and impacts on the consumers, manufacturers, and utilities. There are a number of economic and reliability issues for satisfactory operat
testing the presence of various anions and cations in different toothpastes.
A hypothetical marketiong plan of a toothpaste called White Pearl.Full description
Project of Chemistry on Toothpaste Analysis
Full description
APPLIED ECONOMICS
Inclusive education allows for universal inclusion, participation and achievement of all children, including children with specific learning difficulties. Children form a heterogeneous group with diverse cognitive deficits, special educational needs
The essay describes the Present Condition of E-commerce in BangladeshFull description
Batch Determination in FIFPFull description
Batch Determination in FIFPFull description
Smart grid is in its developing stage in India. National Smart Grid Mission NSGM was propelled by Ministry of Power, that designs and screens approaches and programs for improvement and sending of keen matrix in India. Aggregate of 14 pilot tasks and
Full description
Determination of Dissolved Oxygen in Water Using the Winkler Method
Full description
A Formal ReportFull description
Full description
thanksFull description
Standard Size of Rooms in Residential Building and Their LocationsFull description
prepared by: Ahmed Kaleem Khan Niazi
Ayurveda is the science of life. It plays an important role to prevent and treat the disease. Ayurveda specifically deals with mind body balance. The main part of it is Yoga and Asana. Yoga provide us a simple remedies, facile skills and procedure of
Aim To Check The Ions Present In The Toothpaste And Determine The Quality. Theory Every toothpaste contains the following ingredients: binders, abrasives, subsers, humectants, flavours, sweeteners, fluorides, tooth whiteners, a preservative and water. Binders thicken toothpaste- they prevent separation of the solid and liquid component, especially storage. They also effect the speed and volume of foam production, rate of flavor release and product dispersal, the appearance of toothpaste ribbon on the toothbrush. Some binders are gum solid alignate, methyl cellulose, carrageen and magnesium aluminium silicate Colour Of The Paste- White EXPERIMENT
OBSERVATION
INFERENCE
Take a part of the solution and add MgSO 4 solution.
Formation of white ppt.
CO 3 confirmed
Take a part of the solution and add ammonium hydroxide(1-2 ml)
Formation of white ppt.
Ca confirmed
Take a part of solution and add magnesium mixture
Formation of white ppt.
PO 4 confirmed.
(mixture of NH 4 CL and NH 4 OH)
Acidify a portion of aqueous A yellow ppt. is formed which is solution with dilute HNO 3 . insoluble in NH 4 OH Boil and cool and add AGNO 3 .
Take a small quantity of
Smells like that of vinegar
I is confirmed
CH 3 COO absent
solution and add oxalic acid
Prepare the paste of it with a few drops of water rub and smell.
To one part of the solution add KI
No reaction
Pb absent
To one part of the solution and add solid NH 4 CL and NH 4 OH in slight excess and then add ammonium phosphate
5. (COOH)2 + 2CH3COONa → NO REACTION 6. Pb + 2KI→ NO REACTION 7. MgCl2 + NH4OH+ (NH3)2HPO4 → Mg(NH4)PO4 + 2NH4 +H2O Test On Close Up Colour Of The Paste- Red Gel EXPERIMENT
OBSERVATION
INFERENCE
Take a part of the solution and add MgSO 4 solution.
Formation of white ppt.
CO 3 confirmed.
Take a part of solution and add ammonium oxalic( 1-2 ml) and add little ammonium hydroxide
Formation of white ppt.
Ca confirmed.
Take a part of solution and add magnesia mixture( mixture of NH 2 Cl and NH 4 OH) and allow to stand
Formation of white ppt.
PO 4 confirmed
Acidify a portion of aqueous solution with dilute HNO 3 . Boil and cool and add Ag NO 3 .
Formation of white ppt.
I is confirmed
Take a small quantity of solution and add KI
Formation of white ppt.
CH 3 COO confirmed
To one part of the solution add KI
Formation of white ppt.
Pb is absent
To one part of the solution add solid NH 4 Cl and add NH 4 OH in slight excess then add ammonium phosphate.