A Laboratory Study of Household ChemistryAllyn and Bacon, 1921 - 173 σελίδες |
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Σελίδα 27
... shake from the salt cellar ? What is sometimes added to prevent this ? 4. Nearly all foods and substances of plant and animal life contain water . Heat in a cool dry test tube portions about the size of a bean of the following ...
... shake from the salt cellar ? What is sometimes added to prevent this ? 4. Nearly all foods and substances of plant and animal life contain water . Heat in a cool dry test tube portions about the size of a bean of the following ...
Σελίδα 29
... Shake and look for layers . If a liquid does not dissolve in water , it will form a layer above it if it is lighter than water , or below it if it is heavier than water . Does alcohol dissolve in water ? 2. Repeat ( 1 ) , using kerosene ...
... Shake and look for layers . If a liquid does not dissolve in water , it will form a layer above it if it is lighter than water , or below it if it is heavier than water . Does alcohol dissolve in water ? 2. Repeat ( 1 ) , using kerosene ...
Σελίδα 30
... shaking the tube cool it in running water . Then the solution is supersaturated at this temperature , yet no crystals of sodium thiosulfate appear . Now add a crystal of the salt and note the sudden formation of crystals and the rise in ...
... shaking the tube cool it in running water . Then the solution is supersaturated at this temperature , yet no crystals of sodium thiosulfate appear . Now add a crystal of the salt and note the sudden formation of crystals and the rise in ...
Σελίδα 31
... Shake until it dissolves . Note the boiling point . How does salt dissolved in water affect its boiling point ? B. Freezing Point of Water . 1. Put some pieces of ice in your 150 cc . beaker and add about 25 cc . of water . Carefully ...
... Shake until it dissolves . Note the boiling point . How does salt dissolved in water affect its boiling point ? B. Freezing Point of Water . 1. Put some pieces of ice in your 150 cc . beaker and add about 25 cc . of water . Carefully ...
Σελίδα 39
... shake . Results ? How does this experi- ment show another source of carbon dioxide in the air ? 4. Name three other sources of carbon dioxide in the air . 5. If animals are constantly exhaling carbon dioxide , why does not the per cent ...
... shake . Results ? How does this experi- ment show another source of carbon dioxide in the air ? 4. Name three other sources of carbon dioxide in the air . 5. If animals are constantly exhaling carbon dioxide , why does not the per cent ...
Άλλες εκδόσεις - Προβολή όλων
A Laboratory Study of Household Chemistry (Classic Reprint) Mary Ethel Jones Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
Συχνά εμφανιζόμενοι όροι και φράσεις
acetic add 5 cc albumen alcohol ammonium hydroxide APPARATUS baking powder beaker bleaching blue litmus Bunsen burner burn butter CALORIES carbon dioxide cellulose Chemical properties chemistry cold water color compounds concentrated sulfuric acid containing cool copper sulfate cotton cream crystals delivery tube dextrose dilute dissolve drop dry test tube equation to show evaporating dish Explain Fehling's solution ferment filtrate flask formed funnel gas bottles glass elbow glass plate grams Half fill heat hydrochloric acid instructor Instructor's Experiment iodine laboratory lactose limewater liquid litmus paper magnesium manganese dioxide MATERIALS milk mixture nitrogen Note the odor oxide oxygen phosphorus physical properties piece pneumatic trough potassium chlorate prepared proteins removed Result ring stand salt Small serving soap soda sodium carbonate sodium hydroxide soluble in water splint starch stirring rod stopper strip substance sucrose sulfuric acid taste temperature test tube thermometer wire word-and-symbol equation Write the equation Write the word-and-symbol
Δημοφιλή αποσπάσματα
Σελίδα 139 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 139 - Measures of Length 10 millimeters (mm) =1 centimeter cm 10 centimeters =1 decimeter dm 10 decimeters =1 meter m 10 meters =1 dekameter Dm 10 dekameters =1 hektometer Hm 10 hektometers =1 kilometer Km...
Σελίδα 11 - ... the sulfur? Hold a magnet near a small portion of the mixture. Result? What kind of a change? (b) To a pinch of the mixture in a test tube add about five cubic centimeters of carbon disulfide (explosive near a flame), shake, and filter into an evaporating dish.
Σελίδα 137 - This method depends upon the fact that when a solution of soap is added to a solution of a calcium or magnesium salt an insoluble calcium or magnesium soap is produced.
Σελίδα 157 - EXERCISE— Continued WOMEN NOTE. With active exercise an increase of about 20 per cent total food units may be needed. Metabolism. — The process by which cells are nourished through the assimilation of food, while other cells are broken down to produce energy and heat, is called metabolism.
Σελίδα 21 - Withdraw the taper and then insert it again. Does the hydrogen burn? If so, where? Does the taper burn when in the bottle? When out of the bottle ? Feel of the neck of the bottle ; describe and explain. What...
Σελίδα 85 - Carbohydrates are organic compounds composed of carbon, hydrogen, and oxygen, the hydrogen and oxygen usually being in the same proportion as in water.
Σελίδα 117 - A violet coloration is produced at the junction of the two liquids.
Σελίδα 110 - Cork the mixture up ; let it stand in a warm place for two or three days.
Σελίδα 162 - CAKES, PASTRY, PUDDINGS, AND DESSERTS Cake, chocolate layer . Cake, gingerbread . . Cake, sponge . . . Custard, caramel . . Half ord. sq. pc. Half ord. sq. pc. Small piece...