Marble chips

Before use, the marble chips are washed repeatedly with hot water, and then de-aerated by first etching them with concentrated hydrochloric acid and then boiling them with air-free water under reduced pressure. The chips are then rapidly transferred to the generator small chips should be used and the bulb... 

Marmorbruch, m. marble chips or fragments marble quarry. 

Carbon dioxide gas can be useful in a variety of chemical experiments, too. The procedure for making carbon dioxide gas is essentially the same as it is for making hydrogen and hydrogen sulfide gases, except marble chips are used. Marble is a metamorphic rock that is created when limestone is placed under great pressure at high temperatures. Both limestone and marble are made up of calcium carbonate ... 

Repeat step 1, using 1.00 g of solid CaCOa (marble chips) instead of powdered CaCOa. 

CaCOs Limestone, calcite, calcium carbonate, marble chips, chalk... 

Note 1) held in place by a plug of glass wool supported by indentations in the tube, followed by 100 ml. of marble chips which serve as a vaporizer and preheater for the reactants. The reaction tube is supported in an electrically heated furnace (Note 2) extending from the inlet tube to the joint connecting the condenser. 

CaCOj may be used as small chips or as marble chips. When small chips are used, the reaction will be completed in a much shorter time. 

IN LABORATORY, CARBON DIOXIDE IS USUALLY MADE FROM MARBLE CHIPS AND DILUTED HYDROCHLORIC ACID (1 PART ACID TO 1 PART WATER). PLACE CHIPS ON TOP OF PEBBLES IN YOUR GAS GENERATOR, THEN PROCEED AS FOR MAKING HYDROGEN (PAGE 29). 

SILICIC ACID IS SO WEAK THAT CARBONIC ACID (H2C02) DRIVES IT OUT OF WATER-GLASS. MAKE THE C02 BY POURING HYDROCHLORIC ACID OVER MARBLE CHIPS. 

WHEN MARBLE CHIPS HAVE DISSOLVED IN ACID IN BOTTLE B IN EXPERIMENT ABOVE, POUR SOLUTION INTO CUSTARD CUP. HEAT. 

In the laboratory the gas is made by pouring dilute hydrochloric acid on to marble chips (CaCOs). 

It is prepared from marble chips (calcium carbonate) by the action of dilute hydrochloric acid. 

Calcium carbonate is one of several important inorganic chemicals (Fig. 1) and is widely used in both its pure and its impure states. As marble chips, it is sold in many sizes as a filler for artificial stone, for the neutralization of acids,... 

Calcium oxide (CaO, lime, quicklime, unslaked lime) is differentiated from calcium hydroxide [Ca(OH)2, slaked lime, hydrated lime] and limestone (CaC03, calcite, calcium carbonate, marble chips, chalk) by formula and by behavior. A saturated solution of calcium oxide in water is called limewater and a suspension in water is called milk of lime. 

The experiment was set up as shown below using identical masses of marble chips. Flask A contains larger pieces of marble chips and Flask B contains smaller pieces. The same concentration and volume of acid was used in both flasks. 

Flask A huger pieces of marble chips fhsk 8. smaller pieces ot marble drips... 

For large pieces of marble chips (Flask A). readings (in g) were ... 

Surface area. Using a large mortar and pestle, crush and pulverize about 0.5 g of marble chips. Place the crushed marble chips into one large test tube and 0.5 g of uncrushed marble chips into another. Add 2 mL of 6 M HC1 to each test tube and note the speed of bubbling of the C02 gas. Record your data on the Report Sheet (4). 

The results in Table 5.1.1 were collected from two sets of experiments set up like those in Figures 5.2.1 and 5.2.2 above. The table shows the results obtained when the loss in mass is recorded when 15 g of calcium carbonate as marble chips, react with 50 cm of 2 mol dm hydrochloric acid. 

Table 5.1.1 Table of results obtained in the study of the reaction between dilute hydrochloric acid and calcium carbonate, as large marble chips... 

Figure 5.2.4 Loss of mass for reaction between HCI and marble chips...

Consider again the reaction between calcium carbonate, as marble chips, and hydrochloric acid. 

The structure of the black Hg302Cl2 which, like Hg30Cl4, may be prepared by the action of marble chips on aqueous HgCl2, is complex. There are two kinds of Hg(ii) atoms with quite different environments. The structure is not known... 

In a similar manner, add marble chips (calcium carbonate) to wells D3, C3, and B3 pieces... 

Liquid epoxy resin Magnesium silicate filler Coloring pigments 1 Marble chips Triethylene tetramine (packaged separately)... 

Synthetic resin-bound plasters contain, in addition to the components of an emulsion paint, coarse aggregates (sand, marble chippings, colored stones) to produce decorative effects. 

Weigh 20. g of marble chips, CaC03 place them in the bottle, and replace the rubber stopper. Pour 40. mL of distilled water into the Erlenmeyer flask, and replace the rubber stopper. Be sure that the longer tube dips into the water. Pour 100. mL of 0.010 M calcium hydroxide, Ca(0H)2/ solution into the Florence flask, and replace the rubber stopper. Make certain that the tube dips into the solution. Place the Florence flask in an ice bath contained in a pneumatic trough. Finally, with the buret stopcock closed, add 30. mL of 3 M hydrochloric acid, HCl, solution to the buret. Ask vour instructor to inspect vour apparatus. 

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