Sample S5 has the following characteristic: a. effervesces in diluted HCl acid b. weakly efferve

Sample S5 has the following characteristic: a. effervesces...

Key Concepts

Acid Reaction Test

The acid reaction test involves applying dilute acid to a rock sample to observe bubbling or effervescence. This reaction typically occurs with carbonate minerals, such as calcite, which dissolve in acid and produce carbon dioxide gas. It is a reliable field test used in identifying carbonate-rich sedimentary rocks.

Carbonate Mineralogy

Carbonate minerals, particularly calcite and dolomite, are key components in many sedimentary rocks. Their chemical composition allows them to react with acids, an attribute that aids geologists in determining rock composition and diagenetic history. The degree of reaction can also vary based on factors like crystal size and mineral purity.

Fossil Indicators

The presence of fossil shells within a rock is a significant indicator of its formation in a depositional environment influenced by biological activity. Fossil content not only aids in identifying the rock type but also provides insights into the paleoenvironment, such as water conditions and ecological systems during the time of deposition.

Sedimentary Texture and Composition

Sedimentary rocks are composed of particles that vary in size and origin, ranging from clasts like pebbles to finer sediments. The texture, including the size distribution and matrix composition, reflects the energy conditions of the depositional environment and helps in classifying the rock's origin and environmental setting.

Rock Surface Characteristics

The physical appearance of a rock, such as a sooty or shiny surface, can be indicative of its mineralogical makeup and surface weathering processes. Such textural and visual attributes provide additional clues about the rock’s formation, alteration history, and potential for containing organic or metallic components.

Transcript

00:02 Hi everyone, you know in activity series in activity series silver is present below hydrogen silver lies below hydrogen below hydrogen and therefore its cell will not dissolve therefore silver will not be dissolved in hcl, dismaline hydrochloric acid.

00:57 Then secondly, dimension 2 .55 gram of lead.

01:02 We know the reaction between lead and hcl, that is, pb plus twice hcl gives pbcl2 plus h2 is given out.

01:17 Amount of hcl are required for distribution.

01:31 Of 6 molar and the dissolution of lead is weight of lead upon atomic mass of light mass of p b into moles of hcl divided by moles of p b into moles of of hcl into divided by moles of hcl.

03:01 So, weight of pb, they have given 2 .5 grams into moles of hcl, you know, for one mole of blade you required a 2 moles of hcl into 1000 divided by amount of pv that is 20 atomy pass of pb 207 .2 into moles of pb 1 into moles of hcl in this case required is means the molarity of hcl they have given is 6 6 so that is equal to 5100 divided by 1 ,243 .2 so that is equal to 4 .1 ml therefore amount of 6 molar axial needed to dissolve 2 .55 gram of lead that is equal to 4 .1 ml 4 .1ml.

05:00 So this is the answer for second you can say second then we'll go for third you know they have given 4 .83 gram of tin so you know first reaction reaction that is s n plus 2 hcl gives essential 2 plus h2 gas is q not now amount of hcl amount of hcl that is equal to weight of tin into moles of hcl into 1000 ml of hcl divided by atomic mass of tinn into moles of tin into number of moles of hcl that is the whole that is nothing but molarity of acal.

06:42 So, weight of 10 4 .83 into number of most of acl 2 into 1000 divided by atomic mass of 18.

06:59 180 .71 into 1 into 6...

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