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lodified] The following data were obtained when a \( \mathrm{Ca}^{2+} \) ion-selective electrode was immersed in standard solutions whose ionic strength was constant at \( 2.0 \mathrm{M} \). (a) Prepare a calibration curve and find the least-squares slope and intercept and their standard deviations. \( \begin{array}{lll}\text { slope } & 4.0 \Omega & \pm 4.0 \Omega \\ \text { intercept } & 4.0 \Omega & \pm 4.0 \Omega \\ s_{y} & 4.0 \Omega & \end{array} \) (b) Calculate the value of \( \beta \) in the equation below. Response of \( \mathrm{Ca}^{2}+ \) electrode: \( \quad E= \) constant \( +\beta\left(\frac{0.05916}{2}\right) \log \left(\mathrm{A}_{\mathrm{Ca}} 2+\right)( \) outside \( ) \) \( 4.0 \) \( 4.0 \square \pm 4.0] \)

a) (M) log() E (mv) 3.26E-05 -4.48678 -75.2 3.26E-04 -3.48678 -47 3.26E-03 -2.48678 -18.9 3.26E-02 -1.48678 9.26 3.26E-01