State the orignal phosphare standard solution

Reference no: EM13180355

Pure solid NaH2PO4 is dissolved in distilled water, making 100.0ml of solution. 10 ml of this solution is diluted to 100.00 ml to prepare the orignal phosphare standard solution. Three working standard solution are made from this by pipetting into 0.8 ml, 1.5 ml and 3.0 ml of the orignal standard solution into 100.0 ml volumetric flasks. Acid and molybdate reagent are added and the solution are diluted to 100.0 ml. phosphate in the soft drink. You may assume that all these absorbance measurements have already been corrected for any blank absorbance. The absorbance of each is measured in the spectrophotometer. A 10.0 ml volume of soft drink is treated with acid and reagent and also diluted to 100.00 ml. Its absorbance is also measured. From the following data, plot a calibration line (absorbance vs. concentration), determine its slope and calculate the concentration of phospate in the original soft drink(mM).

Data given:

Mass of NaH2PO4 (mg) -- 536.4

Absorbance standard 1 (0.8 ml) -- 0.1973

Standard 2 (1.5 ml) --- 0.3701

Standard 3 (3.0 ml) --- 0.7402

sample (10.0 ml) -- 0.2230

Please help me with this calculation:

Concentration of orignal phosphate standard (mM)

concentration of standard 1(mM)

concentration of standard 2(mM)

concentration of standard 3(mM)

Slope of calibration line

calculate the concentration of phospate in the original soft drink(mM).

Reference no: EM13180355

Questions Cloud

What is the simple interest due on the loan : A lodge borrows $120,000 for 10 months at an annual interest rate of 9.2%. What is the simple interest due on the loan?

Water molecules states between the liquid and gaseous states : Water molecules change their states between the liquid and gaseous states. A.only when water vapour is saturated B.at all times becauseevaporation and condensationoccur any time C

What is the socially optimal number of movie projections : The total number of movie projections, M, is the sum of the number paid for by each of the two persons: M = MS + ML. Spielberg and Lucas both have income of 70, and the price of both the private good and a movie projection is 1. They are limited, ..

What was the percent increase in the average salaries : What was the percent increase in the average salaries between the two years? Round to the nearest tenth of a percent.a. 7.6%

State the orignal phosphare standard solution : Pure solid NaH2PO4 is dissolved in distilled water, making 100.0ml of solution. 10 ml of this solution is diluted to 100.00 ml to prepare the orignal phosphare standard solution.

Which is the most economical purchase : Which is the most economical purchase?

What is the probability that the outcome of the coin toss : We flip a fair coin and then draw a ball from the first or second urn depending upon whether the outcome was heads or tails respectively. What is the probability that the outcome of the coin toss was heads, given that a white ball was selected.

What is the market clearing price for pollution permits : The mayor also considers issuing pollution permits and establishing a market for these permits. Plant A is given an initial endowment of permits such that it must engage in 60 units of pollution abatement (reduction). Plant B is given an initial e..

Find amounts of rare elements are found within groundwater : Trace amounts of rare elements are found within groundwater and are of interest to geochemists. Europium and terbium are lanthanide-series elements that can be measured from the intensity of their fluorescence emitted when a solution is illuminate..

User Account

All Pages